Church Fathers on Luke 17:2

Because the Pharisees were covetous and railed against Christ when He preached poverty, He put to them the parable of the rich man and Lazarus. Afterwards, in speaking with His disciples concerning the Pharisees, He declares them to be men who caused division, and placed obstacles in the divine way. As it follows: Then said he to his disciples, It is impossible but that offenses will come, that is, hindrances to a good life and which is pleasing to God.

Now there are two kinds of offenses, of which the one resist the glory of God, but the other serve only to cause a stumbling-block to the brethren. For the inventions of heresies, and every word that is spoken against the truth, are obstructions to the glory of God. Such offenses however do not seem to be mentioned here, but rather those which occur between friends and brethren, as strifes, slanders, and the like. Therefore He adds afterwards, If your brother trespass against…

This is spoken according to the custom of the province of Palestine; for among the ancient Jews the punishment of those who were guilty of the greater crimes was that they should be sunk into the deep with a stone tied to them; and in truth it were better for a guilty man to finish his bodily life by a punishment however barbarous, yet temporal, than for his innocent brother to deserve the eternal death of his soul. Now he who can be offended is rightly called a little one;…