Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes have seen, and lest they depart from thy heart all the days of thy life: but teach them thy sons, and thy sons’ sons; If thou shalt hearken unto the voice of the LORD thy God, to keep his commandments and his statutes which are written in this book of the law, and if thou turn unto the LORD thy God with all thine heart, and with all thy soul. Let your heart therefore be perfect with the LORD our God, to walk in his statutes, and to keep his commandments, as at this day. Blessed are they that keep his testimonies, and that seek him with the whole heart. We know that whosoever is born of God sinneth not; but he that is begotten of God keepeth himself, and that wicked one toucheth him not.
~ Deuteronomy 4:9, Deuteronomy 30:10, 1 Kings 8:61, Psalm 119:2, 1 John 5:18
Behold, I come as a thief. Blessed is he that watcheth, and keepeth his garments, lest he walk naked, and they see his shame. Behold, I come quickly: blessed is he that keepeth the sayings of the prophecy of this book.
~ Revelation 16:15, Revelation 22:7
And every man that hath this hope in him purifieth himself, even as he is pure.
~ 1 John 3:3
On Keeping the Heart, by Thomas Reade. This is an excerpt from Chapter Eight of his work, “On the Blessedness of a New Heart”.
“Oh! Divine Redeemer, out of whose inexhaustible fullness I would daily draw a rich supply of grace into my needy soul, be pleased to impart unto me an undivided heart; that to please You, may be my greatest happiness, and to promote Your glory my highest honour. Preserve me from false motives, from a double mind, and a divided heart. Keep me entirely to Yourself, and enable me to crucify every lust, which would tempt my heart from You. Enable me by Your grace to walk in one uniform path of holy, childlike obedience. When tempted to turn aside to the right hand or to the left, may I keep steadily Your way, until brought before Your throne, I see Your face, behold Your smile, and fall in ecstasy at Your feet, lost in wonder, love, and praise.”