1 Our condition here, indeed, is such as you have heard. But our condition hereafter how shall we endure, when we are compelled to give our account for each of those who have been entrusted to us? For our penalty is not limited to shame, but everlasting chastisement awaits us as well. As for the passage, “Obey them that have the rule over you, and submit to them, for they watch in behalf of your souls as they that shall give account;” though I have mentioned it once already, yet I will break silence about it now, for the fear of its warning is continually agitating my soul.
For if for him who causes one only, and that the least, to stumble, it is profitable that “a great millstone should be hanged about his neck, and that he should be sunk in the depth of the sea;” and if they who wound the consciences of the brethren, sin against Christ Himself, what then will they one day suffer, what kind of penalty will they pay, who destroy not one only, or two, or three, but so many multitudes? For it is not possible for inexperience to be urged as an excuse, nor to take refuge in ignorance, nor for the plea of necessity or force to be put forward.
Yea, if it were possible, one of those under their charge could more easily make use of this refuge for his own sins than bishops in the case of the sins of others. Do you ask why? Because he who has been appointed to rectify the ignorance of others, and to warn them beforehand of the conflict with the devil which is coming upon them, will not be able to put forward ignorance as his excuse, or to say, “I have never heard the trumpet sound, I did not foresee the conflict.” For he is set for that very purpose, says Ezekiel, that he may sound the trumpet for others, and warn them of the dangers at hand.
And therefore his chastisement is inevitable, though he that perishes happen to be but one. “For if when the sword comes, the watchman does not sound the trumpet to the people, nor give them a sign, and the sword come and take any man away, he indeed is taken away on account of his iniquity, but his blood will I require at the watchman's hands.”
Source: On the Priesthood (New Advent)