The great mercy of God was made amply clear by Jesus in the parable of the lost (prodigal) son. In the true story of the woman caught in adultery, the infinite mercy of God was again clear. When the scribes and Pharisees brought the woman to Jesus to test him by asking what he says to Moses' commandment that such woman be stoned according to the law, Jesus said to them, "Let the one among you who is without sin be the first to throw a stone at her." In response, one by one they went away. Jesus, left alone with the women, asked her, "Woman, where are they? Has no one condemned you?" She replied, "No one, sir." Then Jesus said, "Neither do I condemn you. Go, from now on do not sin any more."
We see that no matter how sinful we may be, Jesus is not ready to condemn us yet until we've had every chance for repentance and reform. (This is one reason why we should not judge anyone, period.) Since we don't know how long we are going to live nor how we are going to die, it would be wise for us to repent and reform right after sinning each time. Repentance is the key to avoiding final condemnation.