Topical Studies for Proverbs 16:21:
Heart {Forerunner Commentary}
Heart {Nave's Topical Bible}
Man {Forerunner Commentary}
Man {Nave's Topical Bible}
Man {Torrey's Topical Textbook}
Speech {Forerunner Commentary}
Discernment {Forerunner Commentary}
Wise {Forerunner Commentary}