"If you want to be a man of leisure, do not be a man of business. For if you are a man of business, you must be a man of trouble."

"If you are grieved about anything external, it is not the thing itself that troubles you, but your judgment about it. And it is in your power to wipe out this judgment at any moment."

"If you are praised, consider yourself a donkey. If you are blamed, consider yourself a donkey."

"He who is not a good servant will not be a good master."

"It is the nature of the wise to resist pleasures, but the foolish to be a slave to them."