All of our life is but a mass of small habits - practical, emotional, intellectual and spiritual - that bear us irresistibly toward our destiny.

Seek out that particular mental attribute which makes you feel most deeply and vitally alive.

There can be no final truth in ethics any more than in physics, until the last man has had his experience and said his say.

To kill time is not murder, it's suicide.

Man lives for science as well as bread.

No more fiendish punishment could be devised, were such a thing physically possible, than that one should be turned loose in society and remain absolutely unnoticed.

A winner's attitude: it may be difficult, but it's possible. A loser's attitude: It may be possible, but it's too difficult.