Permit me to share a story with you:
“O Love That Will Not Let Me Go” was written on the evening of George Matheson’s sister’s marriage. His whole family had gone to the wedding and left him alone. And he writes of something which had happened to him that caused immense mental anguish.
Many years back, he had been engaged until his fiancĂ© learned that he was going blind, and since there was nothing the doctors could do about it, she told him she couldn’t marry a blind man. The blindness set in while he was studying for ministry.