the purity that is Michael's is his ability to see things in their purity. for example God, animals, kids, nature, what he shows such affection for, is because he sees them for their true nature. its not that he doesnt see the layers that others try to put onto things to twist for their own benefit, he sees those things, and speaks out against such things, but he doesn't pay a lot of attention to politcs or other things that get twisted. you look at what he loves.
the things i mentioned above, Peter Pan, Art, music, and so on. these are things that could be tainted, but in how he loves them, he loves them in their natural state, without adding to them or taking away from them. its not he doesnt see layers others try to add, he just chooses to cast that off, and enjoy them for their natural purity. he has a unique filtering system. i just love him.