Letters 36.11

But I mean to show you later, with more care, that everything which seems to perish merely changes. Since you are destined to return, you ought to depart with a tranquil mind. Mark how the round of the universe repeats its course; you will see that no star in our firmament is extinguished, but that they all set and rise in alternation. Summer has gone, but another year will bring it again; winter lies low, but will be restored by its own proper months; night has overwhelmed the sun, but day will soon rout the night again. The wandering stars retrace their former courses; a part of the sky is rising unceasingly, and a part is sinking.

Seneca, Letters to Lucilius 36.11, translated by Richard Mott Gummere