I'm just telling you, God permits things in our lives sometimes for reasons that we do not understand yet because of the spiritual level that we're on. We can't have any understanding of it, because we're not at a place of spiritual growth yet where we understand the deeper things of God.
It isn't necessary to trust God when we have full understanding and knowledge of what He is doing on our behalf... Trust is needed in those times when, for whatever reason, we are not hearing from God as clearly as we would like.