I've always believed in writing without a collaborator, because where two people are writing the same book, each believes he gets all the worry and only half the royalties.

The first time you do a thing is always exciting.

I've always noticed that if you speak the truth in a rather silly way nobody believes you.

Everything must be taken into account. If the fact will not fit the theory---let the theory go.

Things go entirely differently from the way you planned them.

I learned ... that one can never go back, that one should not ever try to go back - that the essence of life is going forward. Life is really a one way street, isn't it?

Time is the best killer.