The sage who engages in controversy with ignorant people must not expect to be treated with honour; and if a fool should overpower a philosopher by his loquacity it is not to be wondered at, for a common stone will break a jewel.

Saadi Shirazi

Whosoever hath not knowledge, and benevolence, and piety knoweth nothing of reality, and dwelleth only in semblance.

Wickedness, by whomsoever committed, is odious, but most of all in men of learning; for learning is the weapon with which Satan is combated, and when a man is made captive with arms in his hand his shame is more excessive.