What does the Bible say about God establishing our hearts?

In 1 Thessalonians 3:11-13, Paul expresses his prayer for God to establish the hearts of the believers unblameable in holiness before God. This establishment is solely the work of God. He creates a new heart within His children at the new birth, enabling them to worship and trust in Him. The process of establishment involves a growing understanding that our righteousness and holiness come exclusively from Christ, not from our own efforts. As we learn more about His grace and love, our hearts are progressively established on His solid foundation.