Why Understanding the Brain, the Mind and Mental Health Changes How You Understand Yourself

A lot of us group everything happening inside us together, whether that’s thoughts, emotions, reactions, behaviour or mental health. They can start to feel like different parts of the same thing, especially when we’re struggling to understand why we feel or behave a certain way.

I think this is where some of the confusion begins. We might try to change our habits when the real difficulty sits in how we’re interpreting something, or try to control an emotion without understanding what’s creating it. We can end up doing things that sound sensible but don’t really help because we haven’t understood what we’re actually working with first.

One way I’ve found useful for making more sense of this is separating three things that are closely connected but aren’t the same: the brain, the mind and mental health.

Mental health isn’t something that only exists when someone is struggling. We all have a mental health level, and its state can change.

The Brain Is the Physical Foundation

The brain is the physical part. It’s an organ within the body that can be seen, measured, developed, injured and affected by biology. It carries out an enormous number of processes that make it possible for us to think, feel, remember, move and experience life.

Although every brain is different in some way, we all have broadly the same biological foundation. This is why I tend to think of the brain as the physical starting point of the human experience rather than the complete explanation for everything happening inside us.

Sometimes we say things like, “My brain won’t stop overthinking” or “My brain keeps telling me I’m not good enough.” I understand what we mean when we say that, but I think there’s another layer worth separating. The brain makes those experiences possible, but it doesn’t necessarily explain why your thoughts, beliefs and interpretations are so personal to you. That’s where I think the mind becomes important.

The Mind Makes the Experience Personal

You can’t point to the mind in quite the same way you can point to the brain. I think of the mind as the personal experience that develops from your brain interacting with everything you’ve lived through.

Your mind learns, remembers, imagines, questions and interprets. It gives meaning to what happens to you, and that meaning influences how you experience yourself, other people and the world around you.

This helps explain something I’ve always found interesting about people. Two of us can experience almost exactly the same situation and walk away feeling completely differently about it. The situation mightn’t have changed, but the meaning our minds gave to it did.

Imagine two people receive the same criticism at work. One hears useful feedback and moves on, while the other spends the rest of the day wondering whether they’re good enough at their job. The words might have been identical, but they weren’t experienced identically because each person interpreted them through their own mind.

Past experiences, beliefs, memories, expectations and everything else we’ve learnt throughout life can influence that interpretation. This is where individuality starts becoming much easier to understand.

I often explain it using a thumb and a fingerprint. The brain is like the thumb. Everyone has one and it performs broadly the same function. The mind is more like the fingerprint, with each one being unique because every person has developed through a different combination of experiences, relationships, learning, biology and circumstances.

That difference matters because it means understanding somebody’s behaviour often requires more than looking at what happened. We also need to consider what happened meant to them.

Mental Health Is Something We All Have

Mental health is another term that I think can become confusing because we often talk about it only when somebody is struggling. I don’t see mental health as something you either have or don’t have. We all have mental health, and its state can change throughout our lives and even throughout an ordinary day.

I tend to think of it as a running total of many things happening at once. Your thoughts, interpretations, emotions, circumstances, physical state, nervous system, biology and experiences can all influence how you feel and function at a particular time.

That means your mental health isn’t necessarily fixed at the level you woke up with this morning. You might feel relatively balanced when you wake up, become overwhelmed after a difficult conversation and feel completely different twenty minutes later. Another day, the same conversation might affect you far less because everything else going on inside and around you is different.

Sometimes we can recognise what’s affected us and sometimes we can’t. There are also biological, genetic, physical and psychological influences that make the picture much more complicated than simply changing our thoughts or improving our habits.

This is why I don’t think mental health should be reduced to whether somebody is thinking positively enough or living well enough. There are many interacting influences, and they won’t be identical for every person.

Why Separating Them Matters

The reason I find this distinction useful isn’t because we need perfect definitions for everything. It’s because understanding what we’re working with can change the questions we ask ourselves.

If your mental health feels lower than usual, adding more structure to your day might genuinely help. If the difficulty is a thought pattern that keeps interpreting situations in the same way, however, structure alone may not change that interpretation. You can have a productive routine, exercise regularly, sleep well and appear to have everything organised while still carrying a way of interpreting yourself or your life that leaves you feeling unsettled.

This is one reason people can seemingly have everything in place on the outside and still feel completely different internally. What we can see somebody doing doesn’t necessarily tell us what their mind is experiencing.

It also helps explain why advice such as “just stay consistent” won’t answer every problem. Consistency describes behaviour, but not every difficulty begins at the level of behaviour. Sometimes behaviour is simply the part we can see.

There may be an interpretation underneath it, an old belief, something happening in somebody’s circumstances or nervous system, or biological influences involved. More often than not, several of these things are interacting at the same time. Changing the visible behaviour without understanding what sits underneath it can therefore leave the original experience largely untouched.

They’re Separate, but They’re Constantly Influencing Each Other

Separating the brain, the mind and mental health doesn’t mean treating them as three isolated boxes. They constantly influence one another, alongside the nervous system, the body and whatever is happening in our lives.

Your experiences can influence your mind, and your mind interprets those experiences. Those interpretations can influence how you feel and respond, while your current mental health can also affect the way you interpret what happens next. The state of your nervous system can influence how safe, alert or overwhelmed you feel while all of this is happening.

That’s why I don’t think there’s one simple explanation for every thought, emotion or reaction we have. Human experience is more connected than that, and what matters to me is learning to separate the different parts enough that we can start seeing those connections more clearly.

Understanding What You’re Actually Working With

This is where self-awareness becomes important. Being more aware of yourself doesn’t automatically fix anything, but it gives you the opportunity to notice what’s actually happening before deciding what needs to change.

You might notice that the same situations repeatedly affect you, recognise that a particular interpretation appears whenever you feel rejected, or realise that what you thought was a problem with consistency actually changes depending on how overwhelmed you feel. None of those observations immediately gives you an answer, but they give you something much more useful to begin with: a clearer question.

I think we often rush towards improvement because we naturally want difficult experiences to stop. The problem is that when we don’t understand what we’re working with, improvement can become trial and error. We change routines, copy somebody else’s habits or try to control the visible reaction without really knowing what sits underneath it.

Separating the brain, the mind and mental health doesn’t explain everything about being human, and I don’t think any single framework ever could. It simply gives us a clearer way of looking at some of what’s happening inside us.

The brain gives us the biological foundation, the mind makes our experience personal through everything it learns, remembers and interprets, and mental health reflects a changing state influenced by those processes alongside our nervous system, biology, circumstances and experiences.

Once we start understanding those differences, our thoughts, emotions and behaviours can begin making a little more sense. We’re no longer only asking ourselves how to change what we’re doing, because we can start asking a question that I think needs to come first: what am I actually working with?

FAQ

What’s the difference between the brain and the mind?

The brain is the physical organ that provides the biological foundation for human experience. I think of the mind as the personal experience that develops through the brain interacting with everything we experience, learn, remember and interpret throughout life.

Are the brain and the mind completely separate?

No. Separating them is a useful way of understanding their different roles, not a suggestion that they operate independently. They continuously interact, alongside the body, nervous system and our wider circumstances.

Does everyone have mental health?

Yes. Mental health isn’t something that only exists when somebody is struggling. We all have mental health, and its state can change depending on many interacting biological, psychological and environmental influences.

Can your mental health change throughout the day?

It can. A difficult experience, lack of sleep, stress, physical state, interpretation, nervous-system state and many other influences can affect how somebody feels and functions at different points in the day.

Why does understanding the difference matter?

Different experiences may require us to look in different places. Changing a behaviour may sometimes help, but behaviour alone mightn’t explain the interpretation, belief, biological influence or circumstances underneath it. Understanding what we’re working with gives us a better starting point.