Theophylact of Ohrid
Catena Aurea · Lukasevangelium 12
And that servant, which knew his lord’s will, and prepared not himself, neither did according to his will, shall be beaten with many stripes. But he that knew not, and did commit things worthy of stripes, shall be beaten with few stripes. For unto whomsoever much is given, of him shall be much required: and to whom men have committed much, of him they will ask the more.
But he goes on to shew why teachers and learned men deserve a severer punishment, as it is said, For unto whomsoever much is given, of him shall be much required. Teachers indeed are given the grace to perform miracles, but entrusted the grace of speech and learning. But not in that which is given, He says, is any thing more to be sought, but in that which is entrusted or deposited; for the grace of the word needs increase. But from a teacher more is required, for he should not lie idle, but improve the talent of the word.