Disobeying physiological and moral laws leads to impaired self-control and self-destruction.

Original passage

A student may devote all his powers to acquiring knowledge; but unless he has a knowledge of God, unless he obeys the laws that govern his own being, he will destroy himself. By wrong habits, he loses the power of self-appreciation; he loses self-control. He cannot reason correctly about matters that concern him most deeply. He is reckless and irrational in his treatment of mind and body. Through his neglect to cultivate right principles, he is ruined both for this world and for the world to come.