An act has no ethical quality whatever unless it be chosen out of several all equally possible.

The attitude of unhappiness is not only painful, it is mean and ugly.

Where quality is the thing sought after, the thing of supreme quality is cheap, whatever the price one has to pay for it.

We never fully grasp the import of any true statement until we have a clear notion of what the opposite untrue statement would be.

Strength is a facade for the proud, weakness is a mask for the lazy.

(Five) thinkers since Galileo, each informing his successor of what discoveries his own lifetime had seen achieved, might have passed the torch of science into our hands as we sit here in this room. Indeed, for the matter of that, an audience much smaller than the present one, an audience of some 5 or 6 score people, if each person in it could speak for his own generation, would carry us away to the black unknown of the human species, to days without a document or monument to tell their tale.

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