I was looking through a devotional book that someone had given my Grandma Neff (who died before I was born) for Easter, back in the thirties or forties. She was an invalid a long time due to heart disease. Here is a paragraph from the first page:

"We are to cast all our burdens upon the Lord, also the lifelong burdens and afflictions and the long-drawn-out sicknesses. These want to crush a family. There is no escape from the daily sameness. Under such conditions, invalids often become despondent. They become weary of being helpless. Without God and faith in the love of God, such burdens crush us."