Allan Kardec. The book of spirits (№ 397023)

Question: Artificial improvement of breeds of the animal and plant Kingdom by science contradict the laws of nature? More will be according to the law, if you provide a all-natural course of things?
Answer: you Need to do everything possible to achieve perfection; the man himself is a weapon used by God to fulfill his plans. Since perfection is the goal to which all nature is striving, to help this improvement means to contribute to the fulfillment of His purposes.
Question: But the man usually cares about improving the breed only of personal benefit, often without having any other purpose; do not reduce it is his merit?
Answer: What of it, if not its merits; the question is that progress is made; it's up to him to plead that his intention made his work worthy of an award. However, this work develops his mind, and in this respect he brings him the most benefit.