LUCRETIUS.—It is an internal motion, that carries the moisture of the earth into plants, makes them grow, unfolds their fruits, expands their leaves, etc.
POSIDONIUS.—Surely you do not think that there is a being called Vegetation that performs these wonders?
LUCRETIUS.—Who ever thought so?
POSIDONIUS.—From our former colloquy you ought to conclude that the tree did not give vegetation to itself.
LUCRETIUS.—I am forced to allow it.
POSIDONIUS.—Tell me next what life is.
LUCRETIUS.—It is vegetation joined with perception in an organized body.
POSIDONIUS.—And is there not a being called life, that gives perception to an organized body?
LUCRETIUS.—Doubtless vegetation and life are words which signify things that live and vegetate.
POSIDONIUS.—If a tree and an animal cannot give themselves life and vegetation, can you give yourself thoughts?