When the infant is cutting its teeth the mind develops; that is the time of the development of the mind. By keenly watching an infant grow, one will find that the day when it begins to cut its teeth the expression of its eyes changes; a mind is born, a thought is created. It is from that time that it begins to take notice of things and begins to think. The corning of the teeth is only an outward manifestation; the inner process is that the mind is forming. It is therefore a most important time in the life of an infant. For what is mind? Mind is the world. The infant at that time is forming the world in which it will live.