757. 'The floodgates of heaven were opened' means the full extent of temptation involving things of the understanding. This too is clear from what is said above. Temptation involving things of the will, which are evil desires, can never be separated from temptation involving those of the understanding. If it were separated, there would be no temptation at all but a deluge like that which occurs with those who lead lives amid the fires of evil desires, in which, like spirits of hell, they feel the delights of their lives. 'The floodgates of heaven' are so called from the deluge of falsities or reasonings, concerning which the following is also said in Isaiah,

He who is fleeing at the sound of the terror will fall into the pit; and he who is climbing out of the middle of the pit will be caught in the snare, for the floodgates from on high have been opened and the foundations of the earth have been shaken. Isaiah 24:18.