Letters 99.15

And what, then? Now, at this time, am I advising you to be hard-hearted, desiring you to keep your countenance unmoved at the very funeral ceremony, and not allowing your soul even to feel the pinch of pain? By no means. That would mean lack of feeling rather than virtue—to behold the burial ceremonies of those near and dear to you with the same expression as you beheld their living forms, and to show no emotion over the first bereavement in your family. But suppose that I forbade you to show emotion; there are certain feelings which claim their own rights. Tears fall, no matter how we try to check them, and by being shed they ease the soul.

Seneca, Letters to Lucilius 99.15, translated by Richard Mott Gummere