Both humans and animals can form mental pictures and imagine things. Being driven by wild desires is something we share with beasts and monsters like tyrants Phalaris and Nero. Even following basic reasoning for daily tasks is common to those who don't believe in gods, who would betray their country for personal gain, and who do shameful things in private.
To be capable of fancies and imaginations, is common to man and beast. To be violently drawn and moved by the lusts and desires of the soul, is proper to wild beasts and monsters, such as Phalaris and Nero were. To follow reason for ordinary duties and actions is common to them also, who believe not that there be any gods, and for their advantage would make no conscience to betray their own country; and who when once the doors be shut upon them, dare do anything.