The simplest way to be happy is to do good.

Use your eyes as if tomorrow you would be stricken blind. Hear the music of voices, the song of birds, the mighty strains of an orchestra as if you would be stricken deaf tomorrow . . . Smell the perfume of flowers, taste with relish each morsel as if tomorrow you could never smell and taste again. Glory in all the facts of pleasure and beauty which the world reveals to you.

Love is like a beautiful flower which I may not touch, but whose fragrance makes the garden a place of delight just the same.

Do not think of to-day's failures, but of the success that may come tomorrow.

If I could have only one of my senses then I would choose hearing, Then I wouldn't feel so all alone.

The test of all beliefs is their practical effect in life. If it be true that optimism compels the world forward, and pessimism retards it, then it is dangerous to propagate a pessimistic philosophy.

Now I feel as if I should succeed in doing something in mathematics, although I cannot see why it is so very important. . . The knowledge doesn't make life any sweeter or happier, does it?