The worst calamity: 'To have eyes and fail to see.'

So long as you can sweeten another's pain, life is not in vain.

The things you do today that you don't have to do will determine who, what, and where you will be when it is too late to do anything about the things you should have done.

We betray ourselves into smallness when we think the little choices of each day are trivial.

Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing.

Many persons have a wrong idea of what constitutes true happiness. It is not attained through self-gratification but through fidelity to a worthy purpose.

Once it was necessary that the people should multiply and be fruitful if the race was to survive. But now to preserve the race it is necessary that people hold back the power of propagation.