III. THE MEANING AND SAVING SIGNIFICANCE OF THE RESURRECTION
"If Christ has not been raised, then our preaching is in vain and your faith is in vain." The Resurrection above all constitutes the confirmation of all Christ's works and teachings. All truths, even those most inaccessible to human reason, find their justification if Christ by his Resurrection has given the definitive proof of his divine authority, which he had promised.
Source: Catechism of the Catholic Church (Vatican.va)