I watched a person try to close a door onto a terrace. He tried and tried. Then he asked for help. Someone came and saw there was a piece of card jammed under the door to keep it open.

Then there’s the ‘Walker Effect’, the name given to the brief sense of imbalance people often feel when stepping onto an escalator, even when they are fully aware the escalator is broken.

I received a wallet as a gift. It was different from my old one which I loved. I now love it.

What do these three things have in common? Resistance to change is not just a mental thing. Your physical memory and your expectations have an enormous influence too.