Look, even faith doesn't mean believing things for no reason whatsoever.
Yes, it does, faith isn't logical nor is it a rational thing.
Michael is not going to suddenly start believing in flying polka-dotted elephants because he's a person of faith and as such doesn't need such silly things as facts and logic--that isn't how it works.
Yes, it is exactly how it works... There is a whole group of people for example that still believe the Earth is flat in spite of all the evidence and facts to the contrary..
I may believe in global warming because scientists say it's real, and I consider scientists a generally trustworthy source of information.
Yes, so do I, however there is as many people who don't believe in it because people in power tell them it isn't true in spite of the evidence.. They consider the people in positions of power telling them this just as trust worthy... So who is telling the truth? Who is deliberately lying? Or is one side just totally mistaken?
A devout catholic may believe that God wants us to protect the environment because the Pope says so, and he/she considers the Pope a source of trustworthy information.
Yes, but he may also come out and say we don't have to worry about the environment because God
will protect His creation no matter what... Should a good Catholic still believe him? He is still considered a trustworthy source of information, the Faithful or a lot of them still believe the Pope to be infallible..
The point I am trying to make here is it is a lot more complicated when you add religious faith to the mix. It is too simplistic to claim that Michael deliberately lied to Harry about a solution to his problem with the shadow. What many of us are saying is from his point of view he was speaking the truth. . . Whether or not he is or was mistaken is moot because it was never put to the test, and Harry was able to come up with his own alternative cure... It had never happened before as far as the evidence, i.e. Church records show. Michael still could have been totally right, it is just that we will never know.. Alternatively he could have been totally mistaken, we will never know... However he wasn't trying to deliberately lie or sell Harry a bill of goods to get him to give up his magic...