Fortune has no jurisdiction over character. Let him so regulate his character that in perfect peace he may bring to perfection that spirit within him which feels neither loss nor gain, but remains in the same attitude, no matter how things fall out. A spirit like this, if it is heaped with worldly goods, rises superior to its wealth; if, on the other hand, chance has stripped him of a part of his wealth, or even at all, it is not impaired.
—Seneca, Letters from a Stoic