Life is the childhood of our immortality.

Each indecision brings its own delays and days are lost lamenting over lost days... What you can do or think you can do, begin it. For boldness has magic, power, and genius in it.

The people who are absent are the ideal; those who are present seem to be quite commonplace.

Time flies, and what is past is done.

The deepest, the only theme of human history, compared to which all others are of subordinate importance, is the conflict of skepticism with faith.

The credit of advancing science has always been due to individuals and never to the age.

If a man or woman is born ten years sooner or later, their whole aspect and performance shall be different.