James 3:9-10

Verse 9. Therewith bless we God. We men do this; that is, all this is done by the tongue. The apostle goes not mean that the same man does this, but that all this is done by the same organ--the tongue.

Even the Father. Who sustains to us the relation of a Father. The point in the remark of the apostle is, the absurdity of employing the tongue in such contradictory uses as to bless one who has to us the relation of a Father and to curse any being, especially those who are made in his image. The word bless here is used in the sense of praise, thank, worship.

And therewith curse we men. That is, it is one by the same organ by which God is praised and honoured.

Which are made after the similitude of God. After his image, Gen 1:26-27. As we bless God, we ought with the same organ to bless those who are like him. There is an absurdity in cursing men who are thus made, like what there would be in both blessing and cursing the Creator himself.
Verse 10. Out of the same mouth proceedeth blessing and cursing. The meaning here may be, either that out of the mouth of man two such opposite things proceed, not referring to the same individual, but to different persons; or, out of the mouth of the same individual. Both of these are true; and both are equally incongruous and wrong. No organ should be devoted to uses so unlike, and the mouth should be employed in giving utterance only to that which is just, benevolent, and good. It is true, however, that the mouth is devoted to these opposite employments; and that while one part of the race employ it purposes of praise, the other employ it in uttering maledictions. It is also true of many individuals that at one time they praise their Maker, and then, with the sane organ, calumniate, and slander, and revile their fellow-men. After an act of solemn devotion in the house of God, the professed worshipper goes forth with the feelings of malice in his heart, and the language of slander, detraction, or even blasphemy on his lips.

My brethren, these things ought not so to be. They are as incongruous as it would be for the same fountain to send forth both salt water and fresh; or for the same tree to bear different kinds of fruit.
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