The Bumps are What You Climb On by Warren W. Wiersbe is a book that gives encouragement during difficult days. It's a great book that I found on Amazon. It is worth ordering. I got a used on for less than five bucks. They even highlighted the good parts for me at no extra charge.
Here is an excerpt from Chaper One:
"A little boy was leading his sister up a mountain path and the way was not too easy. 'Why, this isn't a path at all,' the girl complained. 'It's rocky and bumpy.' And her brother replied, 'Sure, the bumps are what you climb on.' That's a remarkable piece of philisophy. What do you do with the bumps on the path of life?
...I don't know what difficulties you are going through just now, but I know some of the feelings you have, because I have been on this bumpy road myself. You feel like quitting, like giving up. You can't understand why the road doesn't get easier, why God doesn't remove the stones and straighten the path. If God did that, you might neer get to the top, because the bumps are what you climb on.
...Most of us respond in a predictable way to the rocks in the path. We complain about them; we kick against them and only hurt ourselves. We try to pick them up and get rid of them, only to discover they are too heavy for us. We can't get around them, and we wonder if we can get over them. Some people just stop and go no further. Others give up and turn back. But a child of God does not have to stop or go back; he can use the rocky places in life as stepping-stones to climb higher.
The trouble with most of us is that we are accustomed to paved roads and level sidewalks. But life is not made that way. Sometimes the road is level and easy, and the birds are singing and the way is wonderful. But sometimes the road is rocky and bumpy, and we hear no music and feel no helping hand. Then what? Complain? Give up? No, that's the time to remember God's promise: "For he shall give his angels charge over thee, to keep thee in all thy ways." God's invisible army is at your service, and God can see you through.
...On the road of life there are level places that delight us and there are difficult places that challange us. ...The bumps are what we climb on.
"He shall call upon me, and I will answer him: I will be with him in trouble; I will deliver him, and honour him."
~Psalms 91:15