Draw nigh to God - So “cleave unto Him,” Deu 30:20, namely, by prayerfully (Jam 4:2, Jam 4:3) “resisting Satan,” who would oppose our access to God.
he will draw nigh - propitious.
Cleanse ... hands - the outward instruments of action. None but the clean-handed can ascend into the hill of the Lord (justified through Christ, who alone was perfectly so, and as such “ascended” thither).
purify ... hearts - literally “make chaste” of your spiritual adultery (Jam 4:4, that is, worldliness) “your hearts”: the inward source of all impurity.
double-minded - divided between God and the world. The “double-minded” is at fault in heart; the sinner in his hands likewise.