The eye which turns from a white object in the light of the sun and goes into a less fully lighted place will see everything as dark. - Leonardo da Vinci

If you wish to make an imaginary animal invented by you appear natural, let us say a dragon, take for the head that of a mastiff or hound, for the eyes a cat, and for the ears a porcupine, and for the nose a greyhound, and the brows of a lion, the temple of an old cock, the neck of a terrapin

Truth here makes Falsehood torment lying tongues.

We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.