The essential parts of Christianity are the articles of faith by the denial or ignorance of which we cease to be Christians. The principal of these are: the spiritual deliverance through the suffering and death of Christ; Resurrection from death in confirmation of the sufficient suffering of Christ; and, the return of Christ for reward and punishment, as the fruit and consequence of the deliverance. He who grapples with or disproves these first principles attacks the substance (or essence) of the object.