“When one door of happiness closes, another opens, but often we look so long at the closed door that we do not see the one that has been opened for us.”

The whole secret of existence is to have no fear. Never fear what will become of you, depend on no one. Only the moment you reject all help are you free.

Leadership is the ability to see things as they are, and not as they should be.

Pain of the mind is worse than pain of the body.

Whenever you have eliminated the impossible, whatever remains, however improbable, must be the truth.

Everything should be made as simple as possible, but not simpler.

Once we accept our limits, we go beyond them.