I don't need a friend who change when I change, who nod when I nod. This is something than my own shadow can do. - Plutarch

L'amicizia è animale da compagnia, non da gregge.

A human body in no way resembles those that were born for ravenousness; it hath no hawk’s bill, no sharp talon, no roughness of teeth, no such strength of stomach or heat of digestion, as can be sufficient to convert or alter such heavy and fleshy fare.

4. So reason makes all sorts of life easy, and every change pleasant. Alexander wept when he heard from Anaxarchus that there was an infinite number of worlds, and his friends asking him if any accident had befallen him, he returns this answer: Do not you think it a matter worthy of lamentation, that, when there is such a vast multitude of them, we have not yet conquered one? But Crates with only his scrip and tattered cloak laughed out his life jocosely, as if he had been always at a festival. The great power and command of Agamemnon gave him an equal disturbance: