The fourth point is based on a comparison of the relationships involved in inanimate nature with the ones experienced in a moral situation. We do not censure a tree or a plant for destroying its parent in order to make possible its own growth and development, but we do regard it as a criminal act for a human being to kill his or her parents for any selfish purpose. The fact that the relationship between offspring and parents is the same in both cases is a clear indication that what is moral or immoral about an act is not simply a matter of relationship, knowledge of which is obtained through the reasoning process.The fifth consideration is the fact that the ultimate ends of human action can never be accounted for by reason. If we want to acquire health, the reason can supply information concerning the proper means for obtaining it, but reason cannot prescribe the ends for which the means shall be used.
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