Reformation Day is about "re-forming" the Church; that is, to return to its "substantial form" or essence, namely, the Gospel, that Christ saves sinners. The medieval church had the Gospel, but it was buried under other preoccupations. Today, 52% of "Christians" and 41% of "evangelicals" believe they must be saved by good works rather than by Christ, suggesting that today's church also needs "re-forming."