It is possible to walk before the Lord with a perfect heart! God said to Abraham, “I am the Almighty God; walk before me, and be thou perfect” (Genesis 17:1).
God also said to the children of Israel, “Thou shalt be perfect with the Lord thy God” (Deuteronomy 18:13). David determined in his heart to obey this command. He said, “I will behave myself wisely in a perfect way. . . . I will walk within my house with a perfect heart” (Psalm 101:2).
Scripture also points out that Solomon fell short of God’s command to be perfect: “His heart was not perfect with the Lord his God, as was the heart of David his father. . . . [He] went not fully after the Lord, as did David his father” (1 Kings 11:4-6).
We see the Lord’s command to be perfect in the New Testament, as well. Jesus said, “Be ye therefore perfect, even as your Father which is in heaven is perfect” (Matthew 5:48).
Paul wrote, “That we may present every man perfect in Christ Jesus” (Colossians 1:28). And in the same letter: “That ye may stand perfect and complete in all the will of God” (4:12).
And Peter said, “But the God of all grace, who hath called us unto His eternal glory by Christ Jesus, after that ye have suffered a while, make you perfect, stablish, strengthen, settle you” (1 Peter 5:10).
Perfection does not mean a sinless, flawless heart. Man judges by outward appearances, by what he sees. But God judges the heart, the unseen motives (1 Samuel 16:7). David was said to have had a perfect heart toward God “all the days of his life,” yet he failed the Lord often. His life was marked forever by adultery and a notorious murder.
The basic definition of perfect is: completeness, maturity. In the Hebrew and Greek, the definition includes: uprightness, being without spot, without blemish, totally obedient. It means to finish what was started; a complete performance. Wesley called it “constant obedience.”
A perfect heart is a responsive heart. It quickly and totally answers the Lord’s wooing, whisperings and warnings. This heart says at all times, “Speak, Lord, for your servant hears. Show me the path and I will walk in it.”