I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with him, and he with me. Next, you accept Jesus' death in your place and God's forgiveness of your sin based on that. Then, you trust God to make you into the person He wants you to be. Take the leap of faith.
Faith is trust.
We receive Jesus into our hearts by trusting His Word when He says He's knocking and will come and be with us if we invite Him into our hearts. Lord Jesus, I need You. I acknowledge that I am a sinner. Thank You for dying in my place. I open the door of my life and receive You as my Savior and Lord.