The bulk of the world's knowledge is an imaginary construction.

All the world is full of suffering. It is also full of overcoming.

To be blind is bad, but worse is to have eyes and not see.

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

Speech is the birthright of every child. It is the deaf child's one fair chance to keep in touch with his fellows.

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?

I will not just live my life. I will not just spend my life. I will invest my life.