I would maintain that thanks are the highest form of thought; and that gratitude is happiness doubled by wonder.

Men invent new ideals because they dare not attempt old ideals. They look forward with enthusiasm, because they are afraid to look back.

Gratitude, being nearly the greatest of human duties, is also nearly the most difficult.

There are many definite methods, honest and dishonest, which make people rich; the only instinct I know of which does it is that instinct which theological Christianity crudely describes as the sin of avarice.

If I can put one touch of rosy sunset into the life of any man or woman, I shall feel that I have worked with God.

What embitters the world is not excess of criticism, but absence of self-criticism.

Whatever else may be said of man, this one thing is clear: He is not what he is capable of being.