One of the best-known professors in Princeton Theological Seminary, some years ago, was locally famous for his curious mannerisms. It was said that at certain crises in his lectures he would put his watch in his mouth, to the huge delight of his class. But one is a great teacher in spite of one’s mannerisms, not because of them, and with most of us peculiarities in the class-room greatly detract from and handicap our usefulness as teachers. I am moved to a friendly word of warning at this point because we are approaching the time of year when subtle and imperceptible class-room peculiarities are apt to creep upon us unawares. The first freshness of the year’s work has worn off, “the daily round, the common task” is perhaps beginning to tell on us. Little ruts of expression, little oddities of speech or manner begin to creep upon us unawares. Only eternal vigilance--vigilance tempered, however, with humor and a due sense of proportion--will save us from the danger of establishing some unhappy mannerism which _may_ grow into a beam in comparison with some of the motes we see in our pupils’ eyes! I remember having this brought home to me very forcibly, some years ago, when I had an unusual opportunity of seeing myself as others saw me in the class-room. A lad with an unusual gift of caricature, took off several teachers at an informal evening gathering. After recognizing, with considerable amusement, clever take-offs of several of my colleagues, I suddenly recognized, with equal amusement, myself! In a flash I recognized an unnecessary trick of speech into which I had fallen, hitherto all unconsciously. There were other mannerisms, apparently harmless, but I saw in an instant how useless and objectionable the trick of speech was; and I inwardly blessed the boy for revealing it to me. I have never once used it since. More than this, I was put on my guard, and I have since caught myself at some seedling idiosyncrasy, which I was able to weed out before it took root. It may be that some teachers are immune from this danger, but I believe it is a real one with most of us, and--“let him that thinketh he standeth take heed lest he fall!” As to the Fourteenth Century.