New Revised Standard Version
Keep your heart with all vigilance, for from it flow the springs of life.

Contemporary English Version
Carefully guard your thoughts because they are the source of true life.

New American Bible
With all vigilance guard your heart, for in it are the sources of life.

Douay-Rheims Bible
Remove from thee a froward mouth, and let detracting lips be far from thee.

Remove from thee a froward mouth, and let detracting lips be far from thee.

keep

Proverbs 22:5 Arms and swords are in the way of the perverse: but he that keepeth his own soul, departeth far from them.

Proverbs 23:19 Hear thou, my son, and be wise: and guide thy mind in the way.

Proverbs 28:26 He that trusteth in his own heart, is a fool: but he that walketh wisely, he shall be saved.

Deuteronomy 4:9 Keep thyself therefore, and thy soul carefully. Forget not the words that thy eyes have seen, and let them not go out of thy heart all the days of thy life. Thou shalt teach them to thy sons and to thy grandsons,

Psalm 139:23,24 Prove me, O God, and know my heart: examine me, and know my paths. . . .

Jeremiah 17:9 The heart is perverse above all things, and unsearchable, who can know it?

Mark 14:38 Watch ye: and pray that you enter not into temptation. The spirit indeed is willing, but the flesh is weak.

Hebrews 12:15 Looking diligently, lest any man be wanting to the grace of God: lest any root of bitterness springing up do hinder and by it many be defiled:

with all diligence

Proverbs 4:7 Take hold on her, and she shall exalt thee: thou shalt be glorified by her, when thou shalt embrace her.

Proverbs 3:21 And there shall be life to thy soul, and grace to thy mouth.

Proverbs 11:16 A merciful man doth good to his own soul: but he that is cruel casteth off even his own kindred.

Proverbs 13:3 He that keepeth his mouth keepeth his soul: but he that hath no guard on his speech shall meet with evils.

Ecclesiastes 5:13 There is also another grievous evil, which I have seen under the sun: riches kept to the hurt of the owner.

for

Matthew 12:35 A good man out of a good treasure bringeth forth good things: and an evil man out of an evil treasure bringeth forth evil things.

Matthew 15:19 For from the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies.

Mark 7:21-23 For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, . . .

James 1:14,15 But every man is tempted by his own concupiscence, being drawn away and allured. . . .