[Gen 6:5 KJV] 5 And GOD saw that the wickedness of man [was] great in the earth, and [that] every imagination of the thoughts of his heart [was] only evil continually.

[Deu 5:29 KJV] 29 O that there were such an heart in them, that they would fear me, and keep all my commandments always, that it might be well with them, and with their children for ever!

[Deu 6:5 KJV] 5 And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.

[1Sa 16:7 KJV] 7 But the LORD said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for [the LORD seeth] not as man seeth; for man looketh on the outward appearance, but the LORD looketh on the heart.

[1Ch 28:9 KJV] 9 And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind: for the LORD searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.

[2Ch 12:14 KJV] 14 And he did evil, because he prepared not his heart to seek the LORD.

[Psa 22:26 KJV] 26 The meek shall eat and be satisfied: they shall praise the LORD that seek him: your heart shall live for ever.

[Psa 34:18 KJV] 18 The LORD [is] nigh unto them that are of a broken heart; and saveth such as be of a contrite spirit.

[Psa 51:10, 17 KJV] 10 Create in me a clean heart, O God; and renew a right spirit within me. ... 17 The sacrifices of God [are] a broken spirit: a broken and a contrite heart, O God, thou wilt not despise.

[Psa 57:7 KJV] 7 My heart is fixed, O God, my heart is fixed: I will sing and give praise.

[Pro 4:23 KJV] 23 Keep thy heart with all diligence; for out of it [are] the issues of life.

[Pro 15:13-15 KJV] 13 A merry heart maketh a cheerful countenance: but by sorrow of the heart the spirit is broken. 14 The heart of him that hath understanding seeketh knowledge: but the mouth of fools feedeth on foolishness. 15 All the days of the afflicted [are] evil: but he that is of a merry heart [hath] a continual feast.

[Jer 17:1, 9-10 KJV] 1 The sin of Judah [is] written with a pen of iron, [and] with the point of a diamond: [it is] graven upon the table of their heart, and upon the horns of your altars; ... 9 The heart [is] deceitful above all [things], and desperately wicked: who can know it? 10 I the LORD search the heart, [I] try the reins, even to give every man according to his ways, [and] according to the fruit of his doings.

[Mat 15:19-21 KJV] 19 For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies: 20 These are [the things] which defile a man: but to eat with unwashen hands defileth not a man. 21 Then Jesus went thence, and departed into the coasts of Tyre and Sidon.