Variety improves the things that we do too often, but it rules the things that we don't do often enough.

The truth is, bad things don't affect us as profoundly as we expect them to. That's true of good things, too. We adapt very quickly to either.

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

Few of us can accurately gauge how we will feel tomorrow or next week. That's why when you go to the supermarket on an empty stomach, you'll buy too much, and if you shop after a big meal, you'll buy too little.

I think good things are happening to me and will continue. I am not optimistic about the rest of the species, but I'm so blessed, it's almost scary. I'm sorry to disappoint you, but I have a wildly sunny disposition. I love to laugh.

The mistakes we make when we try to imagine our personal futures are also lawful, regular, and systematic. They, too, have a pattern that tells us about the powers and limits of foresight in much the same way that optical illusions tell us about the powers and limits of eyesight.