Dr. Nelles Silverthorne was, for many years, a consulting physician at the hospital for sick children in Toronto and a research scientist. He made some outstanding contributions to medicine. When whooping cough was a dreaded disease, he developed a vaccine for immunization against it. At a time when many children were dying of measles-pneumonia, Silverthorne, with the aid of an engineer, developed the first ever oxygen tent. But he says his “greatest discovery ever” came when he became a Christian. Writing of the experience later, Dr. Silverthorne said, “Whoever reads this, please be assured that being born again is the greatest decision and the most thrilling experience you can have on earth.” Jesus said, “You must be born again” and “Except a man be born again, he cannot see the kingdom of God.”