Thought it was high time I resurrected Calvin Friday. Here is the Genevan reformer on Matthew 5:29, part of the passage I am preaching on this sunday at our 6pm service.

It might be thought that, considering the weakness of the flesh and of nature, Christ pressed too severely on men, and therefore he anticipates all such complaints. The general meaning is, that however difficult, or severe, or troublesome, or harsh, any commandment of God may be, yet no excuse ought to be pleaded on those grounds, because the justice of God ought to stand higher in our estimation, than all that we reckon most precious and valuable. “You have no right to object to me, that you can scarcely turn your eyes in any direction, without being suddenly drawn away by some temptation: for you ought rather to part with your eyes, than to depart from the commandments of God.” [Commentary on Synoptics, see here]