A Pure Heart, Is That Possible?

“Create in me a clean heart, O God, and renew a right, persevering, and steadfast spirit within me.”
David is speaking to God here about creating in himself a pure heart. What’s a pure heart in a spiritually dead person’s life. Before Jesus came and sacrificed His life for sin, no one had a truly pure heart in God’s eyes. Now David was the apple of God’s eye, but he was not a born again christian back then. When we go through the heart change of becoming a new creation in Christ Jesus, we receive a new heart, spiritually alive to God. What was the pure heart David wanted God to create in him. It all comes down to sin, wrong doings. David did some dastardly things before God, and he knew it was wrong. But God knew David didn’t have the power to resist sin like we can today. A pure heart back in the day was different than a pure heart today after the work at calvary. I believe David longed to walk uprightly before the Lord but his struggle was constantly a bit much, because he was still spiritually dead to God. Because of the sin nature in mankind in the old testament, they could never have what we have today thanks to the sacrifice of Jesus Christ our Lord.