Why is doing the will of the Father important?

In Matthew 7:21, Jesus clearly states, 'Not everyone who says to me, “Lord, Lord,” will enter the kingdom of heaven, but only the one who does the will of my Father in heaven.' The will of the Father is to believe in His Son, Jesus Christ, as seen in John 6:40. This belief is more than just intellectual assent; it involves a trust in Christ's finished work and a reliance on His grace for salvation. Thus, doing the will of the Father signifies a genuine faith that is active and aligns with God's redemptive plan, distinguishing true believers from those who merely profess faith without sincerity.