I have read numerous places about the sister of William Carey. William Carey was one of the great missionaries of the past five hundred years. He spent decades preaching the gospel in India over 200 years ago.
His sister was an invalid—bedridden for over five decades. She wrote many letters to him, and she prayed for him several hours per day for 50 years.
I believe her ministry of prayer was every bit as important as William’s ministry of preaching!