Satan's despair is absolute because Satan, as pure spirit, is pure consciousness, and for Satan (and all men in his predicament) every increase in consciousness is an increase in despair.

With every increase in the degree of consciousness, and in proportion to that increase, the intensity of despair increases: the more consciousness the more intense the despair.

With every increase in the degree of consciousness, and in proportion to that increase, the intensity of despair increases: the more consciousness the more intense the despair

In the vacuum created by fear and ignorance and hunger and want, it's evil, not good, that rushes to fill the void.

I could hear the knock and whistle of the water pipes, the purr of the calico cat. And at that moment a happiness filled me that was pure and perfect and yet it was bled with despair - as if I had been handed a cup of ambrosial nectar to drink from and knew that once I finished drinking, the cup would be withdrawn forever, and nothing to come would ever taste as good.

It's up to you, not fate.