The third link in the chain of becoming a Christian is to Repent of Your Sins:
Luke 13:2,3  2 Jesus answered, "Do you think that these Galileans were worse sinners than all the other Galileans because they suffered this way? 3 I tell you, no! But unless you repent, you too will all perish.
Acts 2:38  38 Peter replied, "Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit.
Acts 3:19  19 Repent, then, and turn to God, so that your sins may be wiped out, that times of refreshing may come from the Lord,
Acts 11:18  18 When they heard this, they had no further objections and praised God, saying, "So then, God has granted even the Gentiles repentance unto life."
Acts 17:30  30 In the past God overlooked such ignorance, but now he commands all people everywhere to repent.