The secret of happiness is variety, but the secret of variety, like the secret of all spices, is knowing when to use it.

The good news is that going blind is not going to make you as unhappy as you think it will. The bad news is that winning the lottery will not make you as happy as you expect.

Happiness refers to feelings, virtue refers to actions, and those actions can cause those feelings. But not necessarily and not exclusively.

Everyone who has observed human behavior for more than thirty continuous seconds seems to have noticed that people are strongly, perhaps even primarily, perhaps even single-mindedly, motivated to feel happy.

Impact is rewarding. Mattering makes us happy.

In short, if we adhere to the standard of perfection in all our endeavors, we are left with nothing but mathematics and the White Album.

The secret of happiness is variety, but the secret of variety, like the secret of all spices, is knowing when to use it.