Repetition shapes belief faster than argument does. The 19th-century American philosopher Charles Sanders Peirce — the founder of pragmatism — made a claim that still hasn't been fully absorbed by business: a belief is not a mental state, it is a habit of action. You don't believe something because you've thought it through; you believe it because you keep acting as though it's true. This reframes a persistent puzzle in organizational life and product design. When people say one thing and do another — claiming they value innovation while punishing every deviation, insisting they want honest input while rewarding flattery — the contradiction isn't hypocrisy. It's just that their real beliefs are encoded in their behavioral routines, not their stated positions. Peirce's idea, pushed further by behavioral economist Richard Thaler's work on 'choice architecture,' suggests a counterintuitive lever: if you want to change what someone believes, don't make the argument — change the habit first. The belief will follow the repeated action, not precede it. Before trying to convince your team, your customers, or yourself of something new, ask which existing routine is actively rehearsing the old belief.

Which belief in your professional life exists only because you keep acting as though it's true — and what would you have to stop doing to test whether it's actually yours?

Drawing from American Pragmatism — Charles Sanders Peirce