“And finally remember that nothing harms him who is really a citizen, which does not harm the state; nor yet does anything harm the state which does not harm law [order]; and of these things which are called misfortunes not one harms law. What then does not harm law does not harm either state or citizen.”

οἷ γ᾽ αὐτῷ κακὰ τεύχει ἀνὴρ ἄλλῳ κακὰ τεύχων
ἡ δὲ κακὴ βουλὴ τῷ βουλεύσαντι κακίστη.
The man who does evil to another does evil to himself, and the evil counsel is most evil for him who counsels it.
He for himself weaves woe who weaves for others woe,
and evil counsel recoils on the counsellor. https://archive.org/stream/b24865898#page/432/mode/2up
Source: Works and Days (c. 700 BC), lines 265-266

Source: The Broken Kingdoms (2011), Chapter 4 “Frustration” (watercolor) (p. 93)

Book I, Ch. 25
Essais (1595), Book I
Source: The Complete Essays

Source: Uncle Tom's Cabin (1852), Ch. 28.

È poco male
Quel fallo poi che al fin in ben riesse.
Act V (Filarco).
Translation reported in Harbottle's Dictionary of quotations French and Italian (1904), p. 295.
Errori d’Amore

Source: A Streetcar Named Desire

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 159
Context: It is sometimes said that scientists are unromantic, that their passion to figure out robs the world of beauty and mystery. But is it not stirring to understand how the world actually works — that white light is made of colors, that color is the way we perceive the wavelengths of light, that transparent air reflects light, that in so doing it discriminates among the waves, and that the sky is blue for the same reason that the sunset is red? It does no harm to the romance of the sunset to know a little bit about it.

Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter XXXV