The single greatest characteristic of the flesh is its insistence on being in control. That's why there is always such a conflict between the flesh and Spirit. (See Galatians 5:17) We want to control our circumstances and, if we can't, we want an explanation from God about why what is happening in our lives is happening -- and it had better be a good reason.
We all want to find relief from the stresses and strains of life. And didn't Jesus promise that He brings us peace? Then how are we supposed to experience it? The answer is to let go of our own life; to lay it down at our Father's feet and recognize that He is in control and not us. The most direct route toward experiencing a sense of peace is to give up our own attempts to be in control and to trust Him.
Our Father is loving and there's no doubt about that. If He is loving and if He is sovereign (and He is both of those), then we can let go and trust Him even when life doesn't make sense. The young couple in the video below model it very well for us all.
The grace walk is a faith walk. Not a faith we muster up by empty words or forced positive thinking, but a faith that comes from knowing who He is and resting in His character when we can do nothing else.
(Thanks to Mike Zenker for sending this video to me)