BY being wiling to understand that the universe and the God above all other gods operates in weird ways. And that his plan, his...way, is not something I will ever know or fully understand.
And by realizing that He does not owe me explanations or guarantees. To me, Faith is about believing, not when it is easy, but when it is hard, when there is not a single reason to believe, and even reasons thew world can show you not to. I think that faith is simply choosing to believe.