The days are long, but the years are short.

A book is a better way to develop a complicated idea, or to tell a big story and to show how ideas weave in and out of each other, which is something that comes up a lot in happiness because all these ideas are interconnected.

He is my fate. He's my soul mate. He pervades my whole existence. So, of course, I often ignore him.

Sometimes, counter-intuitively, it's easier to make a major change than a minor change. When a habit is changing very gradually, we may lose interest, give way under stress, or dismiss the change as insignificant. There's an excitement and an energy that comes from a big transformation, and that helps to create a habit.

It's easy to be heavy; hard to be light.

Habits are the invisible architecture of everyday life.

It's so easy to wish that we'd made an effort in the past, so that we'd happily be enjoying the benefit now, but when now is the time when that effort must be made, as it always is, that prospect is much less inviting.