The fourth link in the chain of becoming a Christian is to Confess Jesus is Lord:
Matthew 10:32,33  32 "Whoever acknowledges me before men, I will also acknowledge him before my Father in heaven. 33 But whoever disowns me before men, I will disown him before my Father in heaven.
Romans 10:9,10  9 That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. 10 For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved.