We should always rely completely on the Holy Spirit to change hearts. The Believer’s goal is to point unbelievers to Christ and trust that the Holy Spirit will change their hearts.
“5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. 6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit (John 3:5-6).