SO GOOD QUOTES

One who wants to learn a foreign language is not a competent instructor of himself; he gets himself taught by experts, and can then talk with foreigners. So, for this high life, which does not advance in nature’s groove, but is estranged from her by the novelty of its course, a man cannot be instructed thoroughly unless he puts himself into the hands of one who has himself led it in perfection; and indeed in all the other professions of life the candidate is more likely to achieve success if he gets from tutors a scientific knowledge of each part of the subject of his choice, than if he undertook to study it by himself; and this particular profession is not one where everything is so clear that judgment as to our best course in it is necessarily left to ourselves; it is one where to hazard a step into the unknown at once brings us into danger. The science of medicine once did not exist; it has come into being by the experiments which men have made, and has gradually been revealed through their various observations; the healing and the harmful drug became known from the attestation of those who had tried them, and this distinction was adopted into the theory of the art, so that the close observation of former practitioners became a precept for those who succeeded; and now any one who studies to attain this art is under no necessity to ascertain at his own peril the power of any drug, whether it be a poison or a medicine; he has only to learn from others the known facts, and may then practise with success.

—St. Gregory of Nyssa, On Virginity, Chap. 23