1
The whole procedure of his thinking, Jason knew, was an imbecilic exercise; there was no compelling reason for him to seek an answer. And yet his mind bored on and on and he could not stop it, hanging with desperation to an impossibility to which it never should have paid attention.Clifford D. Simak
2
The world had opened out and so had the universe, or what she since had thought must have been the universe, lying all spread out before her, with ever nook revealed, with all the knowledge, all the reasons there - a universe in which time and space had been ruled out because time and space were only put there, in the first place, to make it impossible for anyone to grasp the universe. Seen for a moment, half-sensed, a flash of insight that had been gone before there had been time for it to register on her brain, sensed and known for an instant only and then gone so quickly that it had left impression only, no certain memory and no solid knowledge, but impressions only, like a face seen in a lightning flash and then the darkness closing in, .Clifford D. Simak