Scooping up the smallest children, a frantic maid raced out of the flaming house. As she ran, she called loudly to five-year-old Jacky.

But Jacky didn’t follow. Outside, a bystander reacted quickly, standing on the shoulders of a friend. Reaching into the upstairs window, he pulled Jacky to safety—just before the roof caved in. Little Jacky, said his mother Susanna, was “a brand plucked from the burning.” You might know that “brand” as the great traveling minister John Wesley (1703–1791).

Susanna Wesley was quoting Zechariah, a prophet who provides valuable insight into God’s character. Relating a vision he had, the prophet takes…