The product of a broken home in a rough suburb of Tampa, Florida, Jonah Sorrentino was born again at the age of 15, when a family member challenged the wayward teenager and fledgling rapper to take up Christ. Pouring his faith into music, Sorrentino changed his performing name: "KJ" was an abbreviation of a previous alias, while "52," pronounced "five-two," referred to the Bible story in which Jesus fed a multitude with five loaves of bread and two fish. While still a teenager, Sorrentino worked in youth ministry at an inner-city church. He recorded a demo, but it wasn't until...