Looking diligently lest any man fall short of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;
All Commentaries on Hebrews 12:15 Go To Hebrews 12
George Leo Haydock
AD 1849
Be wanting to the grace of God, by resisting and abusing his favours, or by falling from the grace of God received.
Lest any root of bitterness He means scandalous wicked persons, by whom others are infected, defiled, and corrupted. (Witham)