18. Must the evils in the universe be considered as necessary,[266]
because they are the consequences of the superior principles? Yes,
for without them the universe would be imperfect. The greater number
of evils, if not all of them, are useful to the universe; such as
the venomous animals; though they often ignore their real utility.
Even wickedness is useful in certain respects, and can produce many
beautiful things; for example, it leads to fine inventions, it forces
men to prudence, and does not let them fall asleep in an indolent
security.[267]