The prodigal son realized his mistake, he returned. His father was waiting for him. Before he even confessed his sins, the man’s father hugged him. This is the love of God. This is the overabundant mercy.
The older son who was always well behaved.
He speaks the truth, but at the same time he disqualifies himself.
The Church condemns sin because it has to relay the truth: “This is a sin.” But at the same time, it embraces the sinner who recognizes himself as such, it welcomes him, it speaks to him of the infinite mercy of God. Jesus forgave even those who crucified and scorned him. It does not say: and if he should then relapse and go back to his ways and commit more sins, that’s his problem! No, when Peter asked how many times he should forgive someone, Jesus said “Always.”
– Pope Francis, The Name of God Is Mercy