Meditations 2.13

Nothing is more wretched than a man who traverses everything in a round, and pries into the things beneath the earth, as the poet says, and seeks by conjecture what is in the minds of his neighbors, without perceiving that it is sufficient to attend to the daemon within him, and to reverence it sincerely. And reverence of the daemon consists in keeping it pure from passion and thoughtlessness, and dissatisfaction with what comes from gods and men. For the things from the gods merit veneration for their excellence; and the things from men should be dear to us by reason of kinship; and sometimes even, in a manner, they move our pity by reason of men's ignorance of good and bad; this defect being not less than that which deprives us of the power of distinguishing things that are white and black.

Marcus Aurelius, Meditations 2.13, translated by George Long

Nothing can be more miserable than the man who goes through the whole round of things, and, as the poet says, pries into the secrets of the earth, and would fain guess the thoughts in his neighbour's heart, while having no conception that he needs but to associate himself with the divine 'genius' in his bosom, and to serve it truly. And service of it is to keep it pure from passion and aimlessness and discontent with anything that proceeds from Gods or men. For that which proceeds from the Gods is worthy of reverence in that it is excellent; and that which proceeds from men, of love, in that they are akin, and, at times and in a manner, of compassion, in that they are ignorant of good and evil—a defect this no less than the loss of power to distinguish between white and black.

Marcus Aurelius, Meditations 2.13, translated by C. R. Haines