Faith in God, then, is not at all the same as the kind of logical certainty that we attain in Euclidean geometry. God is not the conclusion to a process of reasoning, the solution to a mathematical problem. To believe in God is not to accept the possibility of his existence because it has been «proved» to us by some theoretical argument, but it is to put our trust in One whom we know and love. Faith is not the supposition that something might be true, but the assurance that someone is there.

To be a Christian is to be a traveller. Our situation, say the Greek Fathers, is like that of the Israelite people in the desert of Sinai: we live in tents, not houses, for spiritually we are always on the move. We are on a journey through the inward space of the heart, a journey not measured by the hours of our watch or the days of the calendar, for it is a journey out of time into eternity.

«I believe in you» means: I turn to you, I rely upon you, I put my full trust in you and I hope in you. And that is what we are saying to God in the Creed.

The Christian is the one who, wherever he looks, sees God everywhere and rejoices in him.