It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him.

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

Motivation gets you started, but habit keeps you going.

Science is not only a disciple of reason but, also, one of romance and passion.

Setting an example is not the main means of influencing another, it is the only means.

For the survivor who chooses to testify... his duty is to bear witness.

Working on Star Trek was a highlight of my career.