chapter  XV
BIOLOGY AND MORALITY
Pages 14

It is sometimes assumed that the law of nature is opposed to the moral law, which is conceived to be derived from some source outside nature. Nature, it is said, is selfish, whereas moral law is altruistic. This is due to a misconception of what we mean by 'nature5, which must be taken to include the whole of nature, including man and his social, psycho­ logical, and moral functions. The basis of modern science was laid in the study of the laws of the physical world, but the scientific method of study must extend to the higher functions of the mind and soul, for they, too, are subject to law, and their laws are as natural as the laws which govern the move­ ments of the stars.