"Are we going to be frightened at these
tales of portents, whether of animal or of human
birth? Not to be too verbose, all portents have one
and the same explanation and it is this: whatever
comes into existence, of whatever kind, must needs
find its cause in nature; and hence, even though it
may be contrary to experience, it cannot be contrary to nature. Therefore, explore the cause, if
you can, of every strange thing that excites your
astonishment. If you do not' find the cause be
assured, nevertheless, that nothing could have
happened without a cause, and employ the principles
of natural philosophy to banish the fear which the
novelty of the apparition may have occasioned.
Then no earthquake or opening of the heavens, no
showers of stones or blood, no shooting stars, or
comets, will fill you with alarm.