Certain stages of experience might be compared with the game of Russian billiards, played (as I used to play with Jean, when the time came) on those small green tables, within the secret recesses of which, at the termination of a given passage of time — a quarter of an hour, I think — the hidden gate goes down; after the descent of which, the white balls and the red return no longer to the slot to be replayed; and all scoring is doubled. This is perhaps an image of how we live. For reasons not always at the time explicable, there are specific occasions when events begin suddenly to take on a significance previously unsuspected, so that, before we really know where we are, life seems to have begun in earnest at last, and we ourselves, scarcely aware that any change has taken place, are careering uncontrollably down the slippery avenues of eternity.