Charles Spurgeon Commentary Hebrews 2:15

"and might deliver all them who through fear of death were all their lifetime subject to bondage." — Hebrews 2:15 (ASV)

While it is said, today if you will hear his voice, harden not your hearts, as in the provocation.

Twice over we are warned of this, to avoid hardness of heart.

God save us from ossification of heart, petrifaction of heart, until we get a heart of love or a heart of stone-may God save us from this.