For example, by simply wearing different clothes, you’ll feel different. If you want to feel more confident, dress better. Wear a little cologne or perfume. Do your hair differently. Small external tweaks have the power to create enormous internal shifts.

Precognition, then, is about anticipating and creating your future psychological state by shaping environmental factors in the present.

Necessity, he found, is the single most important ingredient in the formula for greatness—not a particular individual’s brilliance or a lone leader’s vision.

If you want to feel motivated, for example, all you need to do is clap your hands intensely for a few seconds, sprint around your house, and take a cold shower.