QUOTE : ...a subtle form of temptation, very likely to attack one during a wakeful hour of the night when vitality is at its lowest. Because it suddenly seems impossible to go on, values are abruptly turned upside down. To endure--which perhaps a mere half hour before was the right and obvious thing to do--is now presented to the mind as simply ridiculous; escape, which would have seemed despicable a little while ago, now seems to be the only sane course of action. The experienced man knows that it is not impossible to go on because one thinks it is, that you can always go on in some manner while the power of choice remains. This sudden reversal of the values is a temptation to preordain the moment when a man can no longer make his choice, and his responsibility for what happens next must be laid down. Faced with it, the experienced man once more chooses to come to grips with the impossible and finds it possible.