Psalm 37:31 “The law of his God is in his heart; his steps do not slip.”
I strongly advocate Scripture memorization. In our warfare against Satan and his emissaries, we’re told to take “the sword of the Spirit, which is the Word of God” (Ephesians 6:17). Charles Hodge commented on this statement: “In opposition . . . to all the suggestions of the devil, the safe, simple, and sufficient answer is the Word of God. This puts to flight all the powers of darkness. The Christian finds this to be true in his individual experience. It dissipates his doubts; it drives away his fears; it delivers him from the power of Satan.”
To take up this sword, we must have it at hand, in our hearts. We must be like the psalmist who said, “I have stored up your Word in my heart, that I might not sin against you” (Psalm 119:11). This principle of storing up God’s Word has a much wider application than only keeping us from sin. The Word, stored in the heart, provides a mental depository for the Holy Spirit to use to mediate his grace to us, whatever our need for grace might be.
I recently received a phone call with disturbing news, and I went to bed that night feeling as if I’d just received an emotional kick in the stomach. The next morning, however, I awakened with 1 Peter 5:7 going through my mind: “Cast all your anxiety on him because he cares for you” (NIV). I was given grace by God’s Spirit to believe that he did care about this specific situation. That is only one in a series of incidents occurring frequently in my life—and I’m sure in the lives of all other believers who store up God’s Word in their hearts.
From Jerry Bridges Devotionals