And, behold, certain of the scribes said within themselves, This man blasphemes.
All Commentaries on Matthew 9:3 Go To Matthew 9
Theophylact of Ochrid
By knowing their thoughts, Jesus shows that He is God. He rebukes them by saying, "You think that I am blaspheming by promising to forgive sins, which is a great thing, and that I resort to this because it is something which can not be verified. But by healing the body, I shall guarantee that the soul has been healed as well. By doing the lesser deed, though it appears to be more difficult, I shall also confirm the remission of sins, which is indeed something great even though it appears easier to you since it is not visible to the eye."