We have taken our illustrations from natural science, because, since every true discovery in natural science is a divination of a law in nature, attained through a flash of genius, such discoveries really represent acts of spiritual perception, acts of perception by the spiritual man, even though they are generally not so recognized. So we may once more use the same illustration. Perfectly concentrated Meditation, perfect insight into the chrysalis, reveals the caterpillar that it has been, the butterfly that it is destined to be. He who knows the seed, knows the seed-pod or ear it has come from, and the plant that is to come from it. So in like manner he who really knows today, and the heart of to-day, knows its parent yesterday and its child tomorrow. Past, present and future are all in the Eternal. He who dwells in the Eternal knows all three. 17. The sound and the object and the thought called up by a word are confounded because they are all blurred together in the mind. By perfectly concentrated Meditation on the distinction between them, there comes an understanding of the sounds uttered by all beings. It must be remembered that we are speaking of perception by the spiritual man. Sound, like every force, is the expression of a power of the Eternal. Infinite shades of this power are expressed in the infinitely varied tones of sound. He who, having entry to the consciousness of the Eternal knows the essence of this power, can divine the meanings of all sounds, from the voice of the insect to the music of the spheres. In like manner, he who has attained to spiritual vision can perceive the mind-images in the thoughts of others, with the shade of feeling which goes with them, thus reading their thoughts as easily as he hears their words. Every one has the germ of this power, since difference of tone will give widely differing meanings to the same words, meanings which are intuitively perceived by everyone. 18. When the mind-impressions become visible, there comes an understanding of previous births. This is simple enough if we grasp the truth of rebirth. The fine harvest of past experiences is drawn into the spiritual nature, forming, indeed, the basis of its development. When the consciousness has been raised to a point above these fine subjective impressions, and can look down upon them from above, this will in itself be a remembering of past births. 19. By perfectly concentrated Meditation on mind-images is gained the understanding of the thoughts of others. Here, for those who can profit by it, is the secret of thought-reading. Take the simplest case of intentional thought transference. It is the testimony of those who have done this, that the perceiving mind must be stilled, before the mind-image projected by the other mind can be seen. With it comes a sense of the feeling and temper of the other mind and so on, in higher degrees.