What do I mean by the heart? Is it the nervous center in the midst of the breast, the small piece of flesh that doctors call the heart? No, the definition of the heart is that it is the depth of the mind, the mind being the surface of the heart. That in us which feels is the heart, that which thinks is the mind. It is the same thing which thinks and feels, but the direction is different: feeling comes from the depth, thought from the surface. When thought is not linked with feeling it is just like a plant rising up from the earth, the root of which has not gone deep. A thought without feeling is a powerless thought; it is just like a plant without a deep root. A tree the root of which has gone deep into the earth is stronger, more reliable, and so the thought deeply rooted in the heart has greater power. The heart therefore is the factor through which spirits and spirituality are to be attained.

In man's being three aspects can be distinguished: body, heart and soul. The heart is a globe over the soul and the body a cover over the heart. One might ask: Is the soul so small as to be covered by the heart and is the heart so small as to be covered by the body? It is not so. The soul is within and without. For instance, a light is covered by a globe and the globe by another cover-and yet, is the light covered? It shines out just the same. The light is not under the cover; it seems to be under the cover, but it shines out. Such is the soul. The globe does not shine out, but the light takes the color of the globe. It is the soul that is larger; at the same time the light is within the globe and the soul within the body. It is exactly like the light within the globe and the globe within the cover. The light is outside the cover, and the power of the globe shines outside the cover. So the power of the heart is greater than the power of the body, and the power of the soul is greater still. As long as one is ignorant of this, one does not realize truth.