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“The key is to keep company only with people who uplift you, whose presence calls forth your best.”
― Epictetus

“If you are distressed by anything external, the pain is not due to the thing itself, but to your estimate of it; and this you have the power to revoke at any moment.”
― Marcus Aurelius, Meditations

“Luck is what happens when preparation meets opportunity.”
― Seneca

“If you would cure anger, do not feed it. Say to yourself: 'I used to be angry every day; then every other day; now only every third or fourth day.' When you reach thirty days offer a sacrifice of thanksgiving to the gods.”
― Epictetus