“Winter brings the cold and we must shiver; summer brings back the heat and we have to swelter. Bad weather tries the health and we have to be ill. Somewhere or other we are going to have encounters with wild beasts, and with [people], too, – more dangerous than all these beasts. Floods will rob us of one thing, fire of another. These are conditions of our existence which we cannot change. What we can do is adopt a noble spirit, such a spirit as befits a good [person], so that we may bear up bravely under all that fortune sends us and bring our wills into tune with nature’s; reversals, after all, are the means by which nature regulates this visible realm of hers; clear skies follow cloudy; after the calm comes the storm; the winds take turns to blow; day succeeds night; while part of the heavens is in the ascendant, another is sinking. It is by means of opposites that eternity endures.”

– Seneca, Letters From a Stoic