If potential converts (children or adults) are so unfamiliar with basic Bible doctrine that they can understand nothing more than “asking Jesus into their heart,” they probably should wait to make a commitment, until they understand the gravity of sin, and Christ’s offer of forgiveness. Of course, Christians should never make the gospel more complex than it needs to be, but we don’t want to make it trite, either.
—Thomas Kidd, “‘Ask Jesus into Your Heart’: A History of the Sinner’s Prayer” (HT: Kim Riddlebarger)