Taking inspiration from that powerful but somewhat farcical muggle leader, the Pope, would anybody like to join me in a day of repentance?
I'm sorry I left the toilet seat up that one time. And those other times.
I'm sorry I tricked Amycus into going to Botsw- no, actually, that was pretty funny.
I'm sorry I did not have faith that the Dark Lord would return.
I'm sorry I claimed Mulciber put me under the imperius curse to escape prison. You were already convicted mate, to be fair.
I'm sorry I didn't stop drinking that night I left my shoes at Malfoy's house.
I'm sorry my darling wife has to listen to me snore.
I'm sorry for all the times I've been late because I was reading and forgot the time.
I'm sorry I missed my son's first steps, first word, and the first time he used the potty.
I'm sorry I'm so handsome. It must make it difficult to be around me.
p.s. Most of that... I'm not really sorry for. Just as I bet the Pope isn't really sorry for the Inquisition. Muggles are rather like us in some ways.