Out of the same mouth proceedeth blessing and cursing. My brethren, these things ought not so to be. Out of the same mouth - This saying is something like that, Proverbs 18:21 : Death and life are in the power of the tongue; and on this, for an illustration of St. James' words, hear Vayikra Rabba, sec. 33: "Rabbi Simeon, the son of Gamaliel, said to his servant Tobias, Go and bring me some good food from the market: the servant went, and he bought tongues. At another time he said to the same servant, Go and buy me some bad food: the servant went, and bought tongues. The master said, What is the reason that when I ordered thee to buy me good and bad food, thou didst bring tongues? The servant answered, From the tongue both good and evil come to man: if it be good, there is nothing better; if bad, there is nothing worse."
A saying very like that of St. James as found in Rabbi Tanchum, fol. 10, 4: "The mouth desires to study in the law, and to speak good words; to praise God, to glorify him, and to celebrate him with hymns: but it can also slander, blaspheme, reproach, and swear falsely." See Schoettgen.
To find a man who officiates in sacred things to be a common swearer, a slanderer, etc., is truly monstrous; but there have been many cases of this kind, and I have known several. Let me say to all such, My brethren, these things ought not so to be.