Blessed is that servant, whom his lord when he cometh shall find so doing.

Wesley's Notes

12:43 Happy is that servant - God himself pronounces him wise, faithful, happy! Yet we see, he might fall from all, and perish for ever.

Matthew Henry's Concise Commentary

12:41-53 All are to take to themselves what Christ says in his word, and to inquire concerning it. No one is left so ignorant as not to know many things to be wrong which he does, and many things to be right which he neglects; therefore all are without excuse in their sin. The bringing in the gospel dispensation would occasion desolations. Not that this would be the tendency of Christ's religion, which is pure, peaceable, and loving; but the effect of its being contrary to men's pride and lusts. There was to be a wide publication of the gospel. But before that took place, Christ had a baptism to be baptized with, far different from that of water and the Holy Spirit. He must endure sufferings and death. It agreed not with his plan to preach the gospel more widely, till this baptism was completed. We should be zealous in making known the truth, for though divisions will be stirred up, and a man's own household may be his foes, yet sinners will be converted, and God will be glorified.