When her friends say thoughtless or outrageous things on social media, Charlotte chimes in with gentle but firm dissent. She respects the dignity of everyone, and her words are unfailingly positive.

A few years ago she became Facebook friends with a man who harbored anger toward Christians. He appreciated Charlotte’s rare honesty and grace. Over time his hostility melted. Then Charlotte suffered a bad fall. Now housebound, she fretted over what she could do. About that time her Facebook friend died and then this message arrived from his sister: “[Because of your witness] I know he’s now experiencing God’s complete and…