Let me give you an example:
One day you wake up and go to school and everywhere you go people are complaining that they got in trouble for something they didn't do, and in every case a teacher says they saw them doing it--case closed. You have your suspicions about them, but still you wonder about this because it's happening everywhere. Then at the end of the day you meet one new guy that looks a bit strange. He introduces himself and brags in you that he has the ability to change his shape to be anything he desires--a chair, a book, or even just like you! To prove it, he turns into your principal, glasses, moustache and all. Now is his admission a single bit of knowledge, or does it make you go "AHA!" inside and think "Wow, this guy has been impersonating people all over the place and getting them in trouble!" Suddenly your whole strange day makes sense. You not only believe HIM but you believe all your FRIENDS because of him.
It's like that with Christianity and the strange things of this world. Christianity does not merely make sense, but it makes everything else make sense.