Topical Studies for Proverbs 4:23:
Guard {Forerunner Commentary}
Guard {Nave's Topical Bible}
Heart {Forerunner Commentary}
Heart {Nave's Topical Bible}
Life {Forerunner Commentary}
Life {Nave's Topical Bible}
Vigilance {Forerunner Commentary}
Vigilance {Nave's Topical Bible}
Keep {Forerunner Commentary}
Flow {Forerunner Commentary}