Jeremiah 4:14

“O Jerusalem, wash thine heart from wickedness, etc.] These are the words of the prophet, or of God by the prophet, showing the cause of all their ruin and destruction, the wickedness of their hearts; and they are expressed in such form and language, as to be accommodated to the case of any unregenerate sinner: every man’s heart is wicked, desperately wicked, even wickedness itself; everything in it is wicked; the thoughts, and the imagination of the thoughts of the heart, the mind, the understanding, the will, the conscience, and the affections; and everything that is wicked is in that: it is the womb in which all sin is conceived; the shop and forge in which it is wrought; it is the…”

“Only one means of deliverance is left to the Jews--a thorough repentance. vain thoughts--namely, projects for deliverance, such as enlisting the Egyptians on their side. GESENIUS translates, "How long wilt thou harbor vain thoughts?"”

“Thy vain thoughts - “Thy” iniquitous “thoughts.” “Aven,” the word used here, is especially applied to the sin of idolatry: thus Bethel is generally called Bethaven by Hosea (Hosea 4:15; Hosea 5:8, ...), because instead of being the house of God, El, it was the house of an iniquity, Aven, the golden calf. return to 'Top of Page'”

“Wash - As a means to prevent the judgments that are impending. Vain thoughts - Vain fancies of safety. Jeremiah 4:15”

“4:14-15 Jeremiah still hoped that his people would cleanse their heart, get rid of their evil thoughts, and make a clean break with idolatry. Otherwise, they would face God’s judgment (4:1; 6:19; 13:27; 50:17; Prov 1:22; Isa 1:16; Jas 4:8).”

“wash: Isa 1:16-19, Isa 55:7; Eze 18:31; Mat 12:33, Mat 15:19, Mat 15:20, Mat 23:26, Mat 23:27; Luk 11:39; Jam 4:8 How long: Jer 13:27; Psa 66:18, Psa 119:113; Pro 1:22; Act 8:22; Rom 1:21; Co1 3:20 Jeremiah 4:15”