A few reasons why:
- The crucified Jesus (a crucifixion not cancelled out by resurrection).
- The resurrection of Jesus
- The 'missing' body of Jesus (people struggle with belief in bodily resurrection without seeing the body of Jesus, and tend toward resurrection as a bodyless spiritual state, but then imp0rt all the problems of that kind of dualism.)
- The 'general' resurrection
- Imago Dei (Genesis 1:27)
- Creation as good (Genesis 1) and the resurrection of all creation
- The Incarnation, specifically the hypostatic union
- The sacraments
- The call to sexual purity, especially in a society that views sexual expression as the defining personal freedom (1Cor: 6-7)