I clearly remember the first time I ever heard a reference to Ps. 57:7 (My heart is fixed, O God, my heart is fixed: I will sing and give praise.) It was decades ago at a Saturday night Kansas City Youth for Christ rally, and the executive director Al Metsker had just convalesced from open heart surgery. “My heart is fixed! Praise the Lord!” he shouted to the crowd, and he quoted the verse. How capturing that verse was for the situation!
Obviously, the intended meaning of that verse is not related to literal heart surgery. The word fixed in the Hebrew doesn’t mean repaired. It means firm, established, stable or firmly established. It’s the opposite of wishy washy. A fixed heart knows what it believes and in whom it trusts. David wrote the Psalm, and just before this fixed verse, he talked about his trust that God would send his mercy and truth from heaven to save him from the reproach of the enemies whose “teeth are spears and arrows, and their tongue a sharp sword.” (vs. 4) At the time, Saul and his men were chasing David. But the next two verses, he raises his head above the enemy and focuses on God and praises Him for the sure victory that he expected.
Inspirationally, this shows how to have a fixed, steady, stable heart. In the midst of any trial, rather than text a friend, automatically recount in your heart the character and promises of God. Praise Him for certain strength and victory in Him. Lift your eyes off your physical, mental and emotional troubles and spend quality time reminding yourself of who He is. He’s sovereign. He’s in control. He has this. Acknowledge and praise Him for this. (See Phil 4:6-7)
Doctrinally, this fixed heart is prophetic for Israel. In the second half of the tribulation after the antichrist shows his true colors and the Israelites have to run for their lives and they cry out to God, something is going to change. Until that point, they have not acknowledged Jesus Christ, whom they had pierced. Between the middle of the tribulation and the second coming, they are going to have a reckoning with Jesus, and their heart is going to be fixed. Because until then, their heart is stony. How do I know?
Here’s what the prophet Ezekiel said is going to happen with Israel (after the church age is over via the rapture and God turns His complete attention back to Israel): And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh, and will give them an heart of flesh: That they may walk in my statutes, and keep mine ordinances, and do them: and they shall be my people, and I will be their God. (Ezek. 11:19-20)
Their heart is going to be fixed. Like literally, inspirationally and doctrinally. (Also see Ezek. 36:26-27.)
Whether David, you or the Israelites, God is true and faithful, and He rewards those who actively trust in Him and His word. He shall not be afraid of evil tidings: his heart is fixed, trusting in the LORD. (Ps. 112:7)
R&J Shee