When thus renewed, the effects will be seen in the temper, conversation, and conduct at large. (Psalm -Spurgeon's note) Adam Clarke writes "Above all keeping," guard thy heart. Go home, and I pray the Lord hear my desire that your polluted heart may be removed.
Hardness of heart is that state in which a sinner is inclined to, and actually goes on in, rebellion against God. Leb is also used of God in this sense "with my whole heart and with my whole soul” (Jer. Two people are said to be in agreement when their “hearts” are right with each other (2Ki). The “heart” is regarded as the seat of emotions: (Deut. He who knows any thing of himself, knows how apt his affections are to go astray. Cry unto God and say, “Take away my heart of stone, and give me a heart of flesh;” (Ezek -note, Ezek -note) for a stony heart is an impure heart, a divided heart, an unpeaceful heart.
See New Testament word study on Heart = kardia Just as a healthy human heart is at the center of the body and absolutely essential for physical life and health, so too a healthy spiritual heart (intellect, emotion, will) is at the center of one's inner being (soul) and is vital for a healthy soul, serving as the "fountain" of all moral attitudes and actions.
Our spiritual heart thus controls out actions and our actions determine our habits, which in turn determine our character.
The heart of man is naturally depraved and inclined to evil, Jeremiah 17:9 . The “heart” could be regarded as the seat of knowledge and wisdom and as a synonym of “mind.” This meaning often occurs when “heart” appears with the verb “to know” (Dt. David walked “in uprightness of heart” (1Ki 3:6) and Hezekiah “with a perfect heart” (Isa 38:3) before God. As such, it is the fountain of all he does (Pr 4:4). As a man goes on in his own way, his “heart” becomes harder and harder.
A divine power is requisite for its renovation, John 3:1-11 . Only the man with “clean hands, and a pure heart” (Ps. Leb may refer to the seat of rebellion and pride (Ge ; Tyre in Ezek. All his thoughts, desires, words, and actions flow from deep within him. But God will circumcise (cut away the uncleanness of) the “heart” of His people, so that they will love and obey Him with their whole being (Dt. Be glad in the LORD and rejoice, you righteous ones, And shout for joy, all you who are upright in heart.
‘Heart’ may refer to a person’s whole inner life – what the person really is (1 Samuel 16:7; Psalms ; Proverbs ; Matthew ; 1 Thessalonians 2:4); or it may refer to attributes of human personality such as a person’s understanding (1 Kings 3:9; Proverbs ; 1 Corinthians 2:9; Ephesians ), desires (Deuteronomy ; Proverbs ; Matthew ; Romans ), feelings (Judges 19:6; Proverbs ; Proverbs ; John ; James ), determination (Exodus ; 1 Kings ; Romans ; Colossians ), or character (1 Samuel ; Jeremiah ; Romans ; 2 Thessalonians 3:5; 1 Peter 3:4). Ps If I regard wickedness in my heart, The Lord will not hear.Human emotions are more frequently associated with the lower organs." In the context of Proverbs 4, watching over one's heart involves guarding what is said (Pr , and the heart affects what is said, Mt ), what is seen (Pr , Job 31:7, Mt ), and what is done (Pr , 27). And so the order is vitally important and is paralleled by a similar order in Galatians -note where Paul commands us to continually (only possible as the Spirit gives us the desire and the power - Php NLT-note) "walk (present imperative = continually conduct your life) by the Spirit, and you will (absolutely) not carry out the desire of the flesh." Another aspect of regarding wickedness in our heart is when we compromise with sin rather than demonstrate a Spirit enabled holy aversion to it.Charles Wood writes that "In Hebrew the heart is the “kernel of the nut;” the internal citadel of the soul." Be strong, and let your heart take courage, All you who hope in the LORD. The precepts of the LORD are right, rejoicing the heart; The commandment of the LORD is pure, enlightening the eyes. The sanctified believer must have the same attitude toward sin which God has.(Psalm 9:1-Spurgeon's note) Richard Watson - The Hebrews regarded the heart as the source of wit, understanding, love, courage, grief, and pleasure…The heart is said to be dilated by joy, contracted by sadness, broken by sorrow, to grow fat, and be hardened by prosperity.Only God can bring about this cleansing or re-creation (Psalms ; Ezekiel ; Acts -22; Ephesians ; Hebrews ). ) Note also that the Hebrew word for "regard" means "to look with favor upon" or even to "plan".