“God isn’t standing by saying: ‘Now let me see you trying. When I see you have really tried, I will step in and help.’ No, this delay of God is in the nature of things. God is offering himself to me here and now but I cannot receive him. I must have reached a certain level of development before I can begin to do so. New wine cannot be poured into old skins otherwise the skins are spoiled and the wine runs away. God can only come in with his mystical, ‘over-and-above’ help when man has reached his limits and can go no further."
Essence of Prayer