“The most certain sign of wisdom is continual cheerfulness; her state is like the things above the moon, always clear and serene.”

“No one can give you better advice than yourself.”

“What you think of yourself is much more important than what others think of you.”

“The difficulty lies not so much in developing new ideas as in escaping from old ones.”

“Life appears to be too short to be spent in nursing animosity or registering wrongs.”

“The single biggest problem in communication is the illusion that it has taken place.”

“A good word is an easy obligation; but not to speak ill requires only our silence; which costs us nothing.”

“Never lose a chance of saying a kind word.”

“There is no curing a sick man who believes himself to be in health.”

“What you cannot enforce, do not command.”