'Chemists and biochemists are liable to limit themselves unduly to the purely material aspect of things. A chemist's business is to deal with matter in its various forms; that is his job, and he need not be expected to go beyond it. A physicist takes into account the Ether as well, though he may, for a time, prefer to call it space. He is not limited to material particles, but studies the fields of force which connect them and make them active. The psychologist goes further still, and studies the action of the mind. I would I could say that the biologist is a student of life, but at present the tendency is for him only to study animated organisms and their behaviour, limiting his attention to what is manifested by the material processes brought about by life, and not thinking that life has any existence apart from its instrument of manifestation. We shall never understand the Universe by attending to matter alone and ignoring everything which makes it active and interesting.' (CFPF article).
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