The velocity with which time flies is infinite, as is most apparent to those who look back.

Sadness usually results from one of the following causes either when a man does not succeed, or is ashamed of his success.

He who would arrive at the appointed end must follow a single road and not wander through many ways.

A man's ability cannot possibly be of one sort and his soul of another. If his soul be well-ordered, serious and restrained, his ability also is sound and sober. Conversely, when the one degenerates, the other is contaminated.

His head was turned by too great success.

There exists no more difficult art than living.

Everyone rushes his life on, and suffers from a yearning for the future and a boredom with the present. But that man who devotes every hour to his own needs, who plans every day as if it were his last, neither longs for nor fears tomorrow.