James 2:19

“Thou believest that there is one God, etc.] These words are a continuation of the address of the man that has works, to him that boasts of his faith without them, observing to him, that one, and a main article of his faith, is, that there is one God; which is to be understood in the Christian sense, since both the person speaking, and the person spoken to, were such as professed themselves Christians; so that to believe there is one God, is not merely to give into this article, in opposition to the polytheism of the Gentiles, or barely to confess the God of Israel, as believed on by the Jews, but to believe that there are three persons, Father, Son, and Spirit, and that these three are the…”

“Thou--emphatic. Thou self-deceiving claimant to faith without works. that there is one God--rather, "that God is one": God's existence, however, is also asserted. The fundamental article of the creed of Jews and Christians alike, and the point of faith on which especially the former boasted themselves, as distinguishing them from the Gentiles, and hence adduced by James here. thou doest well--so far good. But unless thy faith goes farther than an assent to this truth, "the evil spirits (literally, 'demons': 'devil' is the term restricted to Satan, their head) believe" so far in common with thee, "and (so far from being saved by such a faith) shudder (so the Greek)," Mat 8:29; Luk 4:34; Pe2…”

“Thou believest that there is one God - One of the great and cardinal doctrines of religion is here selected as an illustration of all. The design of the apostle seems to have been to select one of the doctrines of religion, the belief of which would - if mere belief in any doctrine could - save the soul; and to show that even this might be held as an article of faith by those who could be supposed by no one to have any claim to the name of Christian. He selects, therefore, the great fundamental doctrine of all religion, - the doctrine of the existence of one Supreme Being, - and shows that if even this were held in such a way as it might be, and as it was held by devils, it could not save…”

“Thou believest there is one God - I allow this: but this proves only that thou hast the same faith with the devils. Nay, they not only believe, but tremble - At the dreadful expectation of eternal torments. So far is that faith from either justifying or saving them that have it. James 2:20”

“2:19 that there is one God: This is the basic confession of Israel’s faith (see Deut 6:4). • the demons believe: They know that there is one God, and he is their enemy (Mark 1:24).”

“Deu 6:4; Isa 43:10, Isa 44:6, Isa 44:8, Isa 45:6, Isa 45:21, Isa 45:22, Isa 46:9; Zac 14:9; Mar 12:29; Joh 17:3; Rom 3:30; Co1 8:4, Co1 8:6; Gal 3:20; Eph 4:5, Eph 4:6; Ti1 2:5; Jde 1:4 thou doest: Jam 2:8; Jon 4:4, Jon 4:9; Mar 7:9 the: Mat 8:29; Mar 1:24, Mar 5:7; Luk 4:34; Act 16:17, Act 19:15, Act 24:25; Jde 1:6; Rev 20:2, Rev 20:3, Rev 20:10 James 2:20”