No corporeal substance can be so subtle and swift as this.

Rejoicing not in the many but in the probity of the few, we toil for truth alone.

Because they know not the forces of nature, and in order that they may have comrades in their ignorance, they suffer not that others should search out anything, and would have us believe like rustics and ask no reason... But we ask in all things a reason must be sought.

[They say] We do not know how this is, but we know that God can do it. You poor fools! God can make a cow out of a tree, but has He ever done so? Therefore show some reason why a thing is so, or cease to hold that it is so.