Professor Marsh would diagnose an unknown animal from a single bone, so can the day be predicted from the first waking hour. The start is everything, as you well know, and to make a good start you must feel fit. In the young, sensations of morning slackness come most often from lack of control of the two primal instincts--biologic habits--the one concerned with the preservation of the individual, the other with the continuance of the species. Yale students should by this time be models of dietetic propriety, but youth does not always reck the rede of the teacher; and I dare say that here, as elsewhere, careless habits of eating are responsible for much mental disability. My own rule of life has been to cut out unsparingly any article of diet that had the bad taste to disagree with me, or to indicate in any way that it had abused the temporary hospitality of the lodging which I had provided. To drink, nowadays, but few students become addicted, but in every large body of men a few are to be found whose incapacity for the day results from the morning clogging of nocturnally-flushed tissues. As moderation is very hard to reach, and as it has been abundantly shown that the best of mental and physical work may be done without alcohol in any form, the safest rule for the young man is that which I am sure most of you follow--abstinence. A bitter enemy to the bright eye and the clear brain of the early morning is tobacco when smoked to excess, as it is now by a large majority of students. Watch it, test it, and if need be, control it. That befogged, woolly sensation reaching from the forehead to the occiput, that haziness of memory, that cold fish-like eye, that furred tongue, and last week's taste in the mouth--too many of you know them--I know them--they often come from too much tobacco. The other primal instinct is the heavy burden of the flesh which Nature puts on all of us to ensure a continuation of the species. To drive Plato's team taxes the energies of the best of us. One of the horses is a raging, untamed devil, who can only be brought into subjection by hard fighting and severe training. This much you all know as men: once the bit is between his teeth the black steed Passion will take the white horse Reason with you and the chariot rattling over the rocks to perdition.