Why is having a circumcised heart important for Christians?

For Christians, having a circumcised heart is foundational as it allows for true worship and intimacy with God. A heart that has been spiritually changed will desire to worship God in spirit and truth, as stated in John 4:24. This internal transformation results in a true and divine understanding of God’s law, and empowers believers to love Him genuinely and fulfill His commandments out of a joyful heart rather than obligation. It also indicates that one is part of God's chosen remnant and is capable of rejoicing in Christ with no confidence in their own flesh, as emphasized in Philippians 3:3.