12 Take care, brothers, lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God. 13 But exhort one another every day, as long as it is called “today,” that none of you may be hardened by the deceitfulness of sin. 14 For we have come to share in Christ, if indeed we hold our original confidence firm to the end.
The old hymn “Come, Thou Fount of Every Blessing” has a wonderful line that speaks to this passage in Hebrews. It says, “Let thy goodness like a fetter, Bind my wandering heart to Thee, Prone to wander, Lord, I feel it, Prone to leave the God I love” The writer of the book of Hebrews knows that by nature we have a heart that will always wander away from God if left on its own. That’s why we are told to exhort one another every day so our hearts do not become hardened by sin’s deceitfulness. If wandering is then our natural inclination why is it that we have not completely wandered away from the Lord? The reason we don’t wander fully away is the same reason we came to faith in Christ in the first place, because the God who has called us to this salvation is the same God who has justified us in our salvation, who will also glorify us in our final salvation (Rom. 8:30). All of this is by his grace in Christ.