In letter #41, Seneca observes the vitality of the Holy Spirit within the human soul. He considers human excellence, and virtue to be demonstrations of continuity with the Holy Spirit. Living in accordance with nature for Seneca is the soul in union with the Holy Spirit. A union made discordant by vice.
“We do not need to lift our hands to heaven or beg the sexton for nearer access to the idol’s ear, as if he could hear us more clearly; god is near you, with you, inside you. Yes, Lucilius, there is a holy spirit abiding within us who observes our good deeds and bad and watches over us. He treats us according as we treat him. No man is good without god. Could any man rise above Fortune without his help? It is he that imparts grand and upstanding counsel.
“If you see a man undaunted in danger, untouched by passion, happy in adversity, calm in the raging storm, viewing mankind from a higher level and the gods from their own, will you not be moved by veneration? Will you not say: ‘This is too grand and lofty to be of a quality with the little body that contains it; the power that has informed that man is divine?
“A soul which is of superior stature and well governed, which deflates the imposing by passing it by and laughs at all our fears and prayers, is impelled by a celestial force. So great a thing cannot stand without a buttress of divinity. Its larger portion therefore abides at its source. Just as the rays of the sun do indeed warm the earth but remain at the source of their radiation, so a great and holy soul is lowered to earth to give us a nearer knowledge of the divine; but though it is in intercourse with us, it cleaves to its source; it is tied to it, it looks toward it, it seeks to rejoin it, and its concern with our affairs is superior and detached.
“In a vine the peculiar virtue is fertility, and in a man, too, we should praise what is peculiarly his own. He has a handsome troop of slaves, a fine house, broad acres, large investments; but none of these things is in him, they are around him. Praise what cannot be given or taken away, what is peculiarly the man’s. What is this, you ask? It is soul, and reason perfected in the soul.
“Man is a rational animal, and his good is realized if he implements the potentiality for which nature gave him being. And what does reason demand of him? A very easy thing: to live according to his nature. But general derangement makes this difficult; we shove one another into vice. And how can people be recalled to safety when there is a crowd pushing them and nobody to hold them back?
*All excerpts have been taken from The Stoic Philosophy of Seneca: Essays and Letters, W.W. Norton.