3 If your verses were marred by defective arrangement, or violated the laws of prosody, or grated on the ears of the hearer by imperfect rhythm, you would doubtless be ashamed, and you would lose no time, you would take no rest, until you arranged, corrected, remodelled, and balanced your composition, devoting any amount of earnest study and toil to the acquisition and practice of the art of versification: but when you yourself are marred by disorderly living, when you violate the laws of God, when your life accords neither with the honourable desires of friends on your behalf, nor with the light given by your own learning, do you think this is a trifle to be cast out of sight and out of mind? As if, forsooth, you thought yourself of less value than the sound of your own voice, and esteemed it a smaller matter to displease God by ill-ordered life, than to provoke the censure of grammarians by ill-ordered syllables.
Source: Letters (New Advent)