20. The reciprocal destruction of living beings by one another is a law of nature which, at first sight, seems in no way reconcilable with the goodness of God. One asks why he has made it necessary for them to nourish themselves by destroying each other.
For him who sees things only in a material light, whose vision is limited to the present life, this appears indeed an imperfection in the divine plan, because they judge of divine perfection from their point of view. Their own judgment is their measure of his wisdom, and they think that God does not know as well as themselves. Their short-sightedness not permitting them to judge of the whole, they do not comprehend how a real good can result from an apparent evil. The knowledge of the spiritual principle, considered in its veritable essence and by the grand law of unity, which constitutes the full harmony of the universe, can alone give to man the key to this mystery, and show to him the providential wisdom and harmony precisely where he saw only an anomaly and contradiction.