But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these comes from evil.
All Commentaries on Matthew 5:37 Go To Matthew 5
Theophylact of Ochrid
AD 1107
Lest you ask, "How then will people believe what I say?" He says, "They will believe you if you always tell the truth and never swear at all." For no one is disbelieved more than he who is eager to swear that he speaks the truth.
The Lord says that swearing, which is more than "Yea" and "Nay," is of the devil. But, you will ask, is the law of Moses, which bids us to swear, also evil? Learn, then, that at that time it was not evil to swear. But after Christ, it is evil. And so it is with circumcision and, in short, with all the Judaic practices. So also, to nurse at the breast is proper for infants, but shameful for adults.
