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

Saadi Shirazi

Whoso associates with the wicked will be accused of following their ways, though their principles may have made no impression upon him; just as if a person were in the habit of frequenting a tavern, he would not be supposed to go there for prayer, but to drink intoxicating liquor.

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.