To make a commencement requires a mental effort.
No wind blows in favor of a ship without direction.
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.
Life is short and art is long.
No one can be despised by another until he has learned to despise himself.
There exists no more difficult art than living.