Though the dungeon, the scourge, and the executioner be absent, the guilty mind can apply the goad and scorch with blows.

Forbear to spew out reason from your mind, but rather ponder everything with keen judgment; and if it seems true, own yourself vanquished, but, if it is false, gird up your loins to fight.

Those things that are in the light we behold from darkness.

No fact is so simple that it is not harder to believe than to doubt at the first presentation. Equally, there is nothing so mighty or so marvelous that the wonder it evokes does not tend to diminish in time.

Whenever anything changes and quits its proper limits, this change is at once the death of that which was before.

So it is more useful to watch a man in times of peril, and in adversity to discern what kind of man he is; for then at last words of truth are drawn from the depths of his heart, and the mask is torn off, reality remains.

If God can do anything he can make a stone so heavy that even he can't lift it. Then there is something God cannot do, he cannot lift the stone. Therefore God does not exist.