where old ethical thought was already taking on deeper meaning, broader application, and richer life, we find in the Cardinal Virtues of St. Ambrose and St. Augustine a new and vitalized form of the Greek Virtues: Temperance, Christian Fortitude, Christian Wisdom, Christian Justice, God as aim. If we come down to modern times, and catch the spirit of ideals that still dwell among the people, we find that human nature is everywhere the same, and that the experience of human life in all ages discovers through the organization of society the same divine principles—laws to be reverenced and obeyed, to be followed as practical guides to success.
Modern psychology has rendered a service of far-reaching practical benefit in showing more definitely the intimate connection between the brain and mental action. In this connection of body and soul the two are correlated; the brain is organic to the functions of the soul. The health of the brain is largely dependent upon general physical conditions, and the old apothegm, "Mens sana in corpore sano," is interpreted with a new meaning not fully known in the days of Juvenal. Maxims of health, sifted by the experience of ages, transmitted from generation to generation, and confirmed by the proofs of modern science, are wisdom of inestimable value for our instruction. He who wastes energy of the body wastes vigor and duration of mental power. Rev. William R. Alger used to say: "Keep yourself at highest working capacity by preserving the vigor of the body." The various ways of wasting physical energy are susceptible of classification, and it is well worth the while to make a
