But what is meant by according to instruction or doctrine?1 The meaning is, that it is useful for the edification of the Church; for Paul is not wont to give the name of “doctrine” to anything that is learned and known without promoting any advancement of godliness; but, on the contrary, he condemns as vain and unprofitable all the speculations which yield no advantage, however ingenious they may be in other respects. Thus, “He that teacheth, let him do it in doctrine;” that is, let him labour to
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