The Christian understanding of time is characterised by an event which is the very centre of the Christian message, and of which it is said that it happened once and for all. This ephapax is evidently an essential part of the theology of St. Paul and of the Epistle to the Hebrews. The Christian conceives of time like everything else from this centre, i.e. from Jesus Christ, and therefore it is from this centre that our reflection upon the essence of time has to start. This must be stated explicitly because another point of departure has been suggested by traditional theology. Certainly it was an act of great intuition on the part of St. Augustine when in his Confessions he dared, for the first time in history, to put forward the idea that the world was neither timeless and eternal, nor created at a certain point in the time-series, but that the world and time were created together. Therefore if the world and time have the same beginning in creation, it becomes meaningless to ask what God did before the creation of the world. The whole schema of before and after, the framework of time, cannot be regarded as existing before creation, but as coming into being with creation, itself a temporal fact.