Waiting is so unusual that many of us can't stand in a queue for 30 seconds without getting out our phones to check for messages or to Google something.

The optimist underestimates how difficult it is to achieve real change, believing that anything is possible and it's possible now. Only by confronting head-on the reality that all progress is going to be obstructed by vested interests and corrupted by human venality can we create realistic programmes that actually have a chance of success.

Untested assumptions and lazy habits of thought can be shown up, once put in a spotlight of a different hue.

Justice can only be dispensed when you have all the facts in front of you.

If we find it hard to believe that winning millions might not be so lucky after all, we just don't have a good enough imagination. If I fantasise about winning the lottery, it doesn't take long before all sorts of worrisome potential consequences occur to me.

You should protest about the views of people you disagree with over major moral issues, and argue them down, but you should not try to silence them, however repugnant you find them. That is the bitter pill free speech requires us to swallow.

Many people are never happier than when they get the opportunity to complain, while others are deeply unhappy with how things are but just accept the fact. Complaint occurs when we refuse to accept that things are wrong and we do something about it, even if that something is simply articulating our unease.