Isaiah 30:20 - "Though the Lord gave you adversity for food and suffering for drink, he will still be with you to teach you. You will see your teacher with your own eyes."
God expects a lot from us, and many times following him can be painful; but he always acts out of his love for us. Next time you go through a difficult time, try to appreciate the experience and grow from it, learning what God wants to teach you. God may be showing you his love by patiently walking with you through adversity. (LASB 8/16/12)
If you're in a valley, or suffering, I pray those words minister as much to your heart as they did to mine.