Hebrews 12:15 (YLT)

Passage

looking diligently over lest any one be failing of the grace of God, lest any root of bitterness springing up may give trouble, and through this many may be defiled;

Nearby Context

Hebrews 12:13 and straight paths make for your feet, that that which is lame may not be turned aside, but rather be healed;

Hebrews 12:14 peace pursue with all, and the separation, apart from which no one shall see the Lord,

Hebrews 12:15 looking diligently over lest any one be failing of the grace of God, lest any root of bitterness springing up may give trouble, and through this many may be defiled;

Hebrews 12:16 lest any one be a fornicator, or a profane person, as Esau, who in exchange for one morsel of food did sell his birthright,

Hebrews 12:17 for ye know that also afterwards, wishing to inherit the blessing, he was disapproved of, for a place of reformation he found not, though with tears having sought it.

Study Lenses

The verse centers on "grace", "looking", "diligently", "over", "lest", "failing", and "root". It is saying that the verse draws attention to "grace" and "looking", so its meaning should be read from those terms before moving to application.

The nearby context moves from verse 14's "peace pursue with all and the separation..." into verse 16's "lest any one be a fornicator or...", so "grace" and "looking" belong inside that flow. In Hebrews context, the local focus is Christ, faith, and discipleship.

A plain takeaway is to answer the verse's own emphasis on "grace" and "looking" with trust shaped by these words, not by a vague optimism outside the passage.