Matthew was a tax collector, therefore considered a public sinner by the religion he belonged to. Yet Jesus broke protocols to call him. It is easy for us to condemn the sinner, cast aside the one who has done wrong, throw out the person living in sin.
However, that same Jesus broke the protocols for you and gave himself up on the wood of the cross just to save you, a sinner like Matthew. How did Matthew respond? He left everything to follow Jesus. More than that, he attracted people like him to also follow Jesus.
St John tells us that, having been healed, we too must also help others to become healed. Instead of condemning, casting aside, or throwing out the sinner, let us do our part to help him or her follow Jesus.
May God give us the grace to answer Jesus as he invites us daily to follow him. And may he redeem us from the sickness of condemning others who rather need our assistance to also get redemption.