A diamond cannot be polished without friction, nor the man perfected without trials.
Happiness is like a sunbeam, which the least shadow intercepts, while adversity is often as the rain of spring.
A bird does not sing because it has an answer...it sings because it has a song.
A wise man makes his own decisions, an ignorant man follows the public opinion.
He who could foresee affairs three days in advance would be rich for thousands of years