Nothing is so certain as that the evils of idleness can be shaken off by hard work. - Seneca

At any rate, if you wish to sift doubtful meanings of this kind, teach us that the happy man is not he whom the crowd deems happy, namely, he into whose coffers mighty sums have flowed, but he whose possessions are all in his soul, who is upright and exalted, who spurns inconstancy, who sees no man with whom he wishes to change places, who rates men only at their value as men, who takes Nature for his teacher, conforming to her laws and living as she commands, whom no violence can deprive of his possessions, who turns evil into good, is unerring in judgment, unshaken, unafraid, who may be moved by force but never moved to distraction, whom Fortune when she hurls at him with all her might the deadliest missile in her armoury, may graze, though rarely, but never wound.

Thus no fortune, no external circumstance, can shut off the wise man from action. For the very thing which engages his attention prevents him from attending to other things. He is ready for either outcome: if it brings goods, he controls them; if evils, he conquers them.

There is no more stupefying thing than anger, nothing more bent on its own strength. If successful, none more arrogant, if foiled, none more insane—since it’s not driven back by weariness even in defeat, when fortune removes its adversary it turns its teeth on itself.