Caffeine

The most important food to constantly feed your brain is the problems you want it to be solving. These problems do not need to be grand like “solving world hunger.” Maybe one of your problems right now is what to get people for Christmas. You have to define clearly what those problems are and then constantly remind your brain to think about them.

I have noticed that when all the lights are on, people tend to talk about what they are doing – their outer lives. Sitting round in candlelight or firelight, people start to talk about how they are feeling – their inner lives. They speak subjectively, they argue less, there are longer pauses.

To sit alone without any electric light is curiously crea... See more