Beware of missing chances; otherwise it may be altogether too late some day.

You only lose what you cling to.

Life is a succession of moments. To live each one is to succeed.

Most of the shadows of life are caused by standing in our own sunshine.

Good actions give strength to ourselves and inspire good actions in others.

I know but one freedom and that is the freedom of the mind.

In the middle of every difficulty lies opportunity.

Every human being is the author of his own health or disease.

When in doubt, tell the truth.

Every great advance in science has issued from a new audacity of the imagination.