Knee pain can be the result of injury, as well as from mechanical imbalances and other problems. In fact, knee arthritis is the single greatest cause of chronic disability among US adults age 65 and older.
"Do you see it yet? Many times when you are in crisis, you feel as if all your hopes and dreams are gone. Like the wife of Phinehas, everything in you simply wants to quit. Some of you have even been tempted to curse the precious new thing God is doing in your life. If this is where you are today, this is no time for you to give into despair."
What does it mean to be a Latter-day Saint lds.org (a disciple of Jesus Christ)? It is to be “willing to bear one another’s burdens, that they may be light; … willing to mourn with those that mourn; … comfort those that stand in need of comfort, … and to stand as witnesses of God at all times and in all things, and in all places that ye may be in, even until death” http://lds.org/scriptures/bofm/mosiah/18.8-9#7 (Mosiah 18:8-9; the Book of Mormon: Another Testament of Jesus Christ).