Jerome said this quote

Early impressions are hard to eradicate from the mind. When once wool has been dyed purple, who can restore it to its previous whiteness?

~ Jerome

What Saint has ever won his crown without first contending for it?

~ Jerome

For it is good to cleave to God, and to put our hopes in the Lord, so that, when we have exchanged this poor life for the kingdom of heaven, we may cry aloud: 'Whom have I in heaven but thee? There is none upon earth that I desire beside thee.' Assuredly, when we have found such wealth in heaven, we may well grieve to have sought after poor passing pleasures here on earth.

~ Jerome

Never look a gift horse in the mouth.

~ Jerome