1 Tim 1:15-16
"The saying is trustworthy and deserving of full acceptance, that Christ Jesus came into the world to save sinners, of whom I am the foremost. But for that very reason I received mercy, so that in me, the foremost, Jesus Christ might display his perfect patience as an example to those who were to believe in him for eternal life."
The 'faithful saying' (pistos ho logos) — a liturgical formula introducing fundamental doctrinal statements. Paul calls himself 'the foremost of sinners' (proton) — not rhetoric, but genuine conviction based on his persecution of the Church. His conversion is the supreme example of Christ’s patience.