belief that drugs, air, exercise, and so forth, are benefiting us, calling it these things only that affect our bodies. When Truth reaches the understanding it stirs individual error to a change of base; and the wrong and right strive together until victory is decided on the part of immutable harmony. This chemicalization, or change, often follows our explanations of science, the effect of which is that the patient recovers; disease comes to the surface during the chemicalization, like a fermenting fluid, and throws itself off, sometimes in violent perspiration, eruptions, increased secretions, and discharges. We have observed with our students, and with the sick, a constant recurrence of morbid symptoms, moral and physical, till the conflict is decided on the part of Truth. We never witnessed as much effect from what is termed a change of heart, or from cathartics or alterative medicines, as we have seen follow the introduction of the science of being into the minds of the sinner, or the sick; like the little leaven, it leavens the whole lump. These undeniable facts establish the Principle that mind controls the body. Patients with certain mentalities, or students with wrong tendencies and habits, are more difficult to heal or to teach, than others differently constituted. Three classes of students honor Science least, and give the teacher most trouble. The first, whose bigotry and conceit are fixed facts, and the central views, a mysterious God, and natural devil; the second, so early depraved they impersonate innocence, never failing to utter a falsehood, looking you blandly in the face, or to stab their benefactor; the third, so iron-clad with a belief or doctrine, that the bullets of Truth roll off