In his manner of living he did not consult custom, but the needs of his individual nature. It is not always easy for great brain-workers to follow with perfect fidelity the customs of the people about them. These usages have been gradually formed by the majority to suit the needs of the majority; but there are cases where a close adherence to them would be a serious hindrance to the highest and best activity. A good example of this is Kant's intense antipathy to beer. It did not suit him, and he was right in his non-conformity to German usage on this point, but he was mistaken in believing beer to be universally injurious. There is a very general belief in England that what is called a good breakfast is the foundation of the labor of the day. Kant's breakfast, which he took at five in the morning at all seasons of the year, consisted of a cup of tea and a pipe of tobacco. On this he worked eight hours, either in lecturing or writing--a long stretch of uninterrupted labor. He dined at one, and this was his only meal, for he had no supper. The single repast was a deviation from ordinary usage, but Kant found that it suited him, probably because he read in the evening from six till a quarter to ten, and a second meal might have interfered with this by diminishing his power of attention. There exists a strong medical objection to this habit of taking only one meal in twenty-four hours, which indeed is almost unknown in England, though not extremely rare on the Continent. I know an old gentleman who for forty years has lived as Kant did, and enjoys excellent health and uncommon mental clearness. A detail which illustrates Kant's attention to whatever could affect his physical life, is his rule to withdraw his mind from everything requiring effort fifteen minutes before he went to bed. His theory, which is fully confirmed by the experience of others, was, that there was a risk of missing sleep if the brain was not tranquillized before bed-time. He knew that the intellectual life of the day depended on the night's rest, and he took this precaution to secure it. The regularity of his daily walk, taken during the afternoon in all weathers, and the strict limitation of the hours of rest, also helped the soundness of his sleep. He would not walk out in company, for the whimsical reason that if he opened his mouth a colder air would reach his lungs than that which passed through the nostrils; and he would not eat alone, but always had guests to dinner. There are good physiological reasons in favor of pleasant society at table, and, besides these, there are good intellectual reasons also.