"He had no faintest conception till that very hour of how the..." — C.S. Lewis quote meaning

He had no faintest conception till that very hour of how they would look, and even doubted their existence. But when he saw them he knew that he had always known them and realized what part each one of them had played at many an hour in his life when he had supposed himself alone, so that now he could say to them, one by one, not ‘Who are you?’ but ‘So it was you all the time.’ All that they were and said at this meeting woke memories. The dim consciousness of friends about him which had haunted his solitudes from infancy was now at last explained; that central music in every pure experience which had always just evaded memory was now at last recovered...He saw not only Them; he saw Him. This animal, this thing begotten in a bed, could look on Him. What is blinding, suffocating fire to you is now cool light to him, is clarity itself, and wears the form of a man.