To change a belief, boil it

Top line. Want to change someone’s mind? You won’t—unless you shift their underlying beliefs. But strongly held beliefs are hard to move. Read this to learn why beliefs resist change, and how to use behavioural science tactics to gradually dislodge them—and replace them with ones that get you the decisions and behaviours you want.

Drop a frog in boiling water, and it leaps out immediately. But place it in tepid water and slowly turn up the heat, and it stays. Its neurology adapts—all the way to boiling point.

Human beliefs behave the same way. When a new idea that clashes with a strongly held belief lands in mental hot water, it gets rejected outright. But if you shift the underlying belief—slowly, in small, tolerable steps—the mind adapts. Bit by bit, it warms to the new idea. Until it changes.

That’s how minds move. Not by dropping new thoughts into boiling brains—but by gradually turning up the temperature on the existing beliefs that keep them out.

Why beliefs are so hard to shift

Beliefs are mental shortcut tools the subconscious mastermind uses to make millions of fast, low-energy decisions automatically. Around 95% of the mind’s decisions and behaviours are shaped this way.

The energy-challenged brain uses beliefs as decision parameters. They help the mind limit its range of choices to options within preformed boundaries without thinking too hard. So, once a successful belief is formed and tested, the brain wants it to stay put. It protects it.

Beliefs are developed and refined over time, through repeated experience. The successful ones get stored alongside emotional memories and retrieved quickly when the brain faces any decision. Each time a belief works, it gets reinforced. The more it’s used, the stronger and faster the path to it becomes.

An alteration to a belief doesn’t just affect a decision or two. It affects many parts of the decision-making and behaviour selection pattern – including identity. The brain references its belief code to ensure choices and behaviours are always consistent with its established identity. So, a change in a belief also requires the mind to rethink who it is. And because that’s a big ask, the brain is extremely reluctant to make modifications.

Changes to strongly held beliefs modify all our behaviour rules – taking the brain into new uncharted thinking waters that demand huge energy investments to recode a belief and run new simulations. The prospect of burning scarce energy and managing uncertainties until a new belief is bedded down makes the energy scarce brain very reluctant to reconfigure big beliefs. So, the subconscious resists change. Hard.

Can shift happen?

Not easily. But not impossible. Beliefs can be dislodged and reshaped. But only when the mind itself feels that an existing one isn’t working. You certainly can’t tell the mind to change. Research shows that the mind is wired to block coercion. It must make that move itself.

Belief shifts begin with dissonance—when the mind self-spots an uncomfortable gap between a current belief and new evidence or experience. That uncomfortable feeling pushes the brain to interrogate the imbalance and restore it. That’s when a strong internal dialogue kicks in. “Maybe I need to rethink this.”

Without a spark of dissonance, there’s no ignition. And the belief stays rock solid.

How does shift happen?

Not quickly. Each belief has a fixed centre point—a kind of mental anchor. It acts like gravity, pulling in ideas that align and blocking those that don’t. The stronger the belief, the tighter the gravitational pull and the bigger the walls that protect it. Strong beliefs hold firm. They resist any idea that are intolerably too far off the middle.

To keep the centre point fixed, the subconscious deploys a set of internal protectors—automatic mental defences that guard existing beliefs. They are:

• Confirmation bias: This scans for only the evidence that supports an existing belief and filters out contradiction. It preserves belief consistency.
• Reactance bias: It flares up when the mind senses pressure or persuasion, triggering resistance to protect autonomy.
• Identity bias: Defends beliefs tied to self-image. It resists shifts that threaten how we see ourselves.
• Endowment bias:  Makes us cling to what we already have and know—even if change might be better.
• Status Quo bias: Resists the uncertainty of the unfamiliar and defaults to what is already known and familiar, even when the alternative is more logical.

Behavioural science shows that you don’t disarm these guards by confrontation. To move minds, you need to work with them:

• Ask, don’t tell. Questions reduce reactance by triggering internal exploration. They let the mind generate its own reasons to shift.
• Frame change as identity-enhancing. People shift more easily when the new belief helps them become a more successful extension of who they already are.
• Make the cost of staying, visible. To counter endowment bias, surface what might be lost by holding onto the current belief.
• Make the alternative feel safer. Reduce uncertainty by making the new belief predictable, low-risk, and easy to grasp.
• Move the centre point slowly. Keep each shift within the mind’s range of tolerance. Once a new anchor forms, the next shift builds from there.

Belief change is rarely dramatic. It’s a slow boil. The water warms gently. Until the old belief is gone—and the mind doesn’t even notice it’s left.

Guidelines to decode beliefs and shift minds

Minds don’t move because they’re pushed. They move because they’re drawn.

Here are some proven behavioural tactics—grounded in the way the brain actually works—to disarm resistance and shift beliefs from the inside out:

• Start with dissonance. Create gentle discomfort by asking questions that reveal a gap between belief and experience. Telling triggers reactance bias—that inner voice that says, “Don’t tell me what to think.” But enquiry lowers defences. It invites the mind to explore its own inconsistencies—and that’s where shift begins.
• Offer choice, not pressure. The subconscious needs to feel in control. Giving people options satisfies autonomy and reduces resistance. It also boosts persuasion, because self-generated conclusions stick.
• Highlight the cost of staying put. The brain favours the status quo due to endowment bias—it values what it already has. So shine a light on what might be lost by holding onto the current belief. Make the consequences of inaction more visible than the risk of change.
• Make change feel safe. New beliefs often trigger uncertainty bias. Reduce the unknown. Use clear, simple messaging. Let the mind “try on” a belief before committing. Familiarity lowers perceived risk.
• Introduce contrast slowly. A belief has a centre point and a narrow radius of tolerance. Push too far, and the mind rejects it. Shift the centre point gradually with just enough stretch to stay within range. Over time, this expands the radius and widens what the mind can accept.
• Use identity as a lever. Don’t ask someone to become someone new. Show them how the shift makes them more of who they already are—or want to be. People adopt new beliefs more readily when those beliefs upgrade their identity rather than threaten it.
• Leverage social proof. Beliefs are contagious. Use stories, stats, or examples of similar people who’ve made the shift. The more relevant, recent, and close to home the proof feels, the more powerful it becomes.
• Allow self-persuasion. Let people voice their own doubts and reasons for change. Reflect their words back. Minds move best when they think they’re moving themselves.
• Repeat and reinforce. One nudge won’t do it. Familiarity breeds comfort. Comfort opens the door to change.
• Stay patient. Minds don’t leap. They simmer. Every belief shift starts small. Boil slowly.

 The bottom line? To change minds, you must shift the underlying beliefs—and the only way to shift a strongly held belief is gradually, from the inside out.

About

Jonathan Hall is the CEO of ThinkWorks, a behavioural science consultancy that helps organisations move more minds with influence science. ThinkWorks blends the disciplines of strategy, behavioural science, and communication art to produce messaging tactics that persuade effectively.

Jonathan is a graduate of Wits Business School, has trained in strategic modelling at Aix-Marseille University in France, and is certified in behavioural economics, brand, and narrative science.

He is the author of the e-books The Power of Brand Story and BrainSell. His work has earned several accolades, including the IMM Marketing Company of the Year award, a Deloitte Best Company to Work For award, and a PSA Innovator of the Year award.

To find out if ThinkWorks can help your organisation to motivate minds to move, contact ThinkWorks soon. jonh@thinkworks.co.za | +27 83 251 0716