He is a double-minded man, unstable in all his ways.
double-minded--literally, "double-souled," the one soul directed towards God, the other to something else. The Greek favors ALFORD'S translation, "He (the waverer, Jam 1:6) is a man double-minded, unstable," &c.; or better, BEZA'S. The words in this Jam 1:8 are in apposition with "that man," Jam 1:7; thus the "us," which is not in the original, will not need to be supplied, "A man double-minded, unstable...
Verse 8. A double-minded man. The word here used (διψυχος) occurs only here and in . It means, properly, one who has two souls; then one who is wavering or inconstant. It is applicable to a man who has no settled principles; who is controlled by passion; who is influenced by popular feeling; who is now inclined to one opinion or course of conduct, and now to another.
A double minded man [is] unstable in all his ways. (g) In all his thoughts and his deeds.