People are powerfully moved by imagination, belief, and knowledge. They can consider the past and future. They can make changes in their behavior out of reason, in a way that animals can’t do.

The biggest waste of time is to do well something that we need not do at all.

Remember that although the distinction can be difficult to draw, loneliness and solitude are different.

We must exercise ourselves in the things which bring happiness, since, if that be present, we have everything, and, if that be absent, all our actions are directed toward attaining it.

The most reliable predictor of not being lonely is the amount of contact with women. Time spent with men doesn't make a difference.

Happiness can seem like an abstract, transcendent notion, but in fact, I found that getting enough sleep (very important!!), getting exercise, not letting myself get too hungry, not letting myself get too cold (I'm a person who is always cold), made a big difference. Partly because I felt happier, partly because feeling physically comfortable makes it easier to keep other difficult happiness-boosting resolutions like biting my tongue.

Sometimes I succeed, sometimes I fail, but every day is a clean slate and a fresh opportunity.