Ponder for a long time whether you shall admit a given person to your friendship; but when you have decided to admit him, welcome him with all your heart and soul. Speak as boldly with him as with yourself.
When once ambition has passed its natural limits, its progress is boundless.
The young man must store up, the old man must use.
Life's neither a good nor an evil: it's a field for good and evil.
Laugh at your problems; everybody else does.
A dwarf is small even if he stands on a mountain; a colossus keeps his height, even if he stands in a well.