Letters 41.5

When a soul rises superior to other souls, when it is under control, when it passes through every experience as if it were of small account, when it smiles at our fears and at our prayers, it is stirred by a force from heaven. A thing like this cannot stand upright unless it be propped by the divine. Therefore, a greater part of it abides in that place from whence it came down to earth. Just as the rays of the sun do indeed touch the earth, but still abide at the source from which they are sent; even so the great and hallowed soul, which has come down in order that we may have a nearer knowledge of divinity, does indeed associate with us, but still cleaves to its origin; on that source it depends, thither it turns its gaze and strives to go, and it concerns itself with our doings only as a being superior to ourselves.

Seneca, Letters to Lucilius 41.5, translated by Richard Mott Gummere