"I discovered that when I believed my thoughts, I suffered, but that when I didn’t believe them, I didn’t suffer, and that this is true for every human being." Byron Katie author of Loving What Is

You are lying to yourself right now. So am I.

Not on purpose. Not because we're dishonest people. Because it's what the brain does, every single day, dozens of times over — and most of us never catch it happening.

Last week you probably had a thought like "I'm not coping as well as I should" or "my memory is going" or "everyone else has this figured out." In the moment, it felt like fact. It felt like you'd simply noticed something true about yourself.

It wasn't. It was a story your brain told you and sold you at the same time.

The problem is that our thoughts are not always reliable. In fact, one of the most important skills for protecting both your emotional wellbeing and your brain health is learning to question your thoughts rather than automatically believing them.

Your Brain Is a Narrator, Not a Camera

Your brain's primary job is to keep you safe — not to give you an accurate picture of the world.

To do that, it's constantly interpreting, predicting, filling in gaps and scanning for threats, most of it outside your conscious awareness. That's useful when you're crossing a busy road. It's less useful when it's narrating your career, your relationships, or your memory.

Because a narrator, unlike a camera, takes liberties. It jumps to conclusions. It assumes the worst. It notices the one thing that went wrong and skips over the ten things that went right. It treats uncertainty as danger, just to be safe.

The result: a thought can feel completely true without actually being true. And when we repeatedly believe distorted or exaggerated thoughts, they don't just pass through — they shape how we feel and how our brain functions.

What's Actually Happening Inside Your Brain

When you have a negative thought, your brain doesn't just file it away as information. It responds to it.

One of the key players is the limbic system — the brain's emotional alarm centre. When it detects a threat, it prepares your whole body to react. The trouble is, it can't tell the difference between a real threat and a perceived one.

So if your mind keeps telling you "I can't handle this," or "something bad is going to happen," your brain starts responding as if those things were already true. Stress hormones rise. Anxiety builds. Your attention narrows and your emotions intensify.

Meanwhile, your prefrontal cortex — the part responsible for planning, perspective and rational thought — quietens down.

When the emotional brain gets louder, the thinking brain gets quieter.

That's why it's so hard to think clearly when you're anxious, overwhelmed or upset. The very thoughts causing you distress are also the ones making it harder to see the situation accurately.

A Quick Example of How This Plays Out

Imagine you forget someone's name at a social event.

The immediate thought: "My memory is getting worse."

Let's test it.

Is it true? Possibly — but not necessarily.

Can you be absolutely certain? No.

How do you feel when you believe it? Anxious. Concerned. Frustrated.

Who would you be, or how would you feel without that thought? Calm, positive, hopeful.

Now try turning it around: "I forgot one name. That happens to people of all ages." Or: "Maybe I was distracted, or tired, or thinking about something else."

Notice how differently that lands. The situation hasn't changed. Your interpretation has — and so has how you feel.

That's the entire idea in miniature. What follows is how to do it deliberately, every time.

Why This Matters More in Midlife

By our 50s and 60s, most of us are carrying more than we did at 30 — work pressures, financial worries, ageing parents, health concerns, shifting family dynamics, questions about what comes next.

When negative thoughts become repetitive, they keep the brain in a prolonged state of stress. And this is the part worth sitting with: research has linked repetitive negative thinking not just to poorer mental wellbeing, but to a greater risk of cognitive decline over time.

That's not a scare tactic. It's a reason. The way you think, day after day, isn't just a mood issue — it's a brain-health issue.

This doesn't mean suppressing difficult thoughts or pretending everything's fine. It means learning to examine your thoughts before you accept them as facts.

The Goal Isn't Positive Thinking

When people hear about challenging negative thoughts, they often assume it means swapping every negative thought for a positive one.

It doesn't.

The goal is accurate thinking, not positive thinking. If you're facing a genuine challenge, fake positivity won't help you. What helps is seeing the situation as it really is — not through a lens of fear, frustration or assumption.

So instead of asking "How can I think positively?" — try asking:

"Is this thought actually true?"

That one question is surprisingly powerful.

Six Ways Our Thoughts Distort Reality

Psychologists have identified common thinking patterns that quietly make situations seem worse than they are. You'll likely recognise several of these in yourself.

1. All-or-Nothing Thinking Seeing things as entirely good or entirely bad. "I made one mistake, so the whole project was a failure."

2. Fortune-Telling Predicting a bad outcome with no real evidence. "This is definitely going to end badly."

3. Mind Reading Assuming you know what someone else is thinking. "They didn't reply to my message. They must be annoyed with me."

4. Filtering Out the Positive Replaying the one thing that went wrong and forgetting the five things that went right.

5. Labelling Attaching a harsh, permanent label to yourself over a single moment. "I always get things wrong." "I'm useless."

6. Guilt-Based Thinking Running your day on should, must and ought — and feeling like you've failed the moment you don't.

Any one of these, left unchecked, can quietly steer your mood, your stress levels and your decisions — often without you noticing it's happening.

"The only thing you fear is the unreality that you yourself have invented."

~Byron Katie

A Practical Tool: The Work, by Byron Katie

One of the simplest ways to challenge a stressful thought comes from a process called The Work, developed by Byron Katie.

After years of severe depression, she had a profound realisation: much of her suffering came not from her circumstances, but from believing every thought that entered her mind. Out of that, she built a simple process for testing whether a thought is actually true.

It's a good fit here because it's built around accuracy, not positivity.

Step 1: Name the thought. Write down exactly what's causing the distress. "My memory is terrible." "Nobody appreciates what I do." Be specific.

Step 2: Is it true? Ask yourself honestly. Most likely, it feels true — that's exactly the trap.

Step 3: Can you be certain? Look for evidence against it. Are there exceptions? Can you say, with total certainty, that it's true? Usually, the honest answer is no.

Step 4: Notice what believing it costs you. How does this thought affect your mood, your stress levels, your relationships, your behaviour, your body? This is where you feel the price of believing it.

Step 5: Turn it around. Find a more accurate version. Not a more flattering one — a more true one.

"My memory is terrible" might become: "My memory isn't as sharp as it once was, but there's a lot I still remember well." Or: "There are things I can actively do to support my memory."

Train Your Brain to Question Itself

Most people spend decades practising negative thinking without ever realising that's what they're doing.

Here's the encouraging part: the brain is adaptable. Every time you pause to question an unhelpful thought instead of automatically believing it, you strengthen the pathways responsible for perspective, reasoning and emotional regulation. You're teaching your brain to pause before it reacts.

Over time, that single habit can lower your stress, build your resilience, and help you meet whatever comes next with a clearer head.

A Thought to Take With You

Your thoughts shape your emotions, your behaviour, your beliefs — and even how your brain functions. That's exactly why they're worth questioning.

Not every thought is true.

The next time you catch yourself spiralling into worry, frustration or self-criticism, pause and ask one simple question:

"Is it true?"

You were lying to yourself again this morning. The good news? Now you know how to catch it.