In God we trust; all others pay cash.

All marriedcouples should learn the art of battle as they should learn the art of makinglove. Good battle is objective and honest never vicious or cruel. Good battleis healthy and constructive, and brings to a marriage the principle of equalpartnership.

Man alone contains within himself as many species as exist on earth.

A shipin harbor is safe, but that is not what ships arebuilt for.

Be notdisturbed at being misunderstood; be disturbed at not understanding.

Sciencecannot resolve moral conflicts, but it can help to more accurately frame thedebates about those conflicts.

He whocannot cut the bread evenly cannot get on well with people.

It isnot necessary to understand things in order to argue about them.

Sometimesyou have to be silent to be heard.

In all superstitions wise men follow fools.

Responsibility is the high price of self-ownership.

Thereare no secrets. There is no mystery. There is only common sense.