A.T. Robertson Commentary James 4:8

"Draw nigh to God, and he will draw nigh to you. Cleanse your hands, ye sinners; and purify your hearts, ye doubleminded." — James 4:8 (ASV)

Draw nigh to God (εγγισατε τω θεω). First aorist active imperative of εγγιζω, late verb from εγγυς (near) as in Mt 3:2. With dative case again of personal relation. The priests in the sanctuary drew nigh to God (Exodus 19:22), as we should now.

Cleanse your hands (καθαρισατε χειρας). First aorist active imperative of καθαριζω, to cleanse, from dirt in a ritual sense (Exodus 30:19–21; Mr 7:3,19). Here it is figurative, as in Ho 1:16; Psalms 24:4. If we always had clean (from sin) hands and hearts?

Ye sinners (αμαρτωλο). A sharp term to strike the conscience, "a reproach meant to startle and sting" (Ropes).

Purify your hearts (αγνισατε καρδιας). First aorist active imperative of αγνιζω, old verb from αγνος (James 3:17), ceremonially (Acts 21:24,26), but here morally as in 1 Peter 1:22; 1 John 3:3. Anarthrous use of καρδιας as of χειρας (wash hands, purify hearts).

Ye double-minded (διψυχο). As in 1:8.