What convinced you to WANT to live a Christian life? It was the Holy Spirit. See, it is completely possible to live in this world without a spiritual influence, but it is completely impossible to live as a Christian in this world without the influence of the Holy Spirit providing motivation and power. Through your new identity in Christ, you have all the potential you need to live as a new creation in Christ. But without the Holy Spirit working in you, you would have no desire to live that way.