The modern Gamaliel should teach ethics. Ethics is the science of human duty. Arithmetic tells man how to count his money; ethics how he should acquire it, whether by honesty or fraud. Geography is a map of the world; ethics is a beautiful map of duty. This ethics is not Christianity, it is not even religion; but it is the sister of religion, because the path of duty is in full harmony, as to quality and direction, with the path of God.