Transgression by whomsoever committed is blamable but more so in learned men, because learning is a weapon for combating Satan and, when the possessor of a weapon is made prisoner, his shame will be greater.

It is better to be an ignorant poor fellow
Then a learned man who is not abstemious;
Because the former loses the way by his blindness
While the latter falls into a well with both eyes open.



Saadi Shirazi

http://www.poemhunter.com/poem/ch-08-on-rules-for-conduct-in-life-maxim-44/