15. To him who possesses discernment, all personal life is misery, because it ever waxes and wanes, is ever afflicted with restlessness, makes ever new dynamic impresses in the mind; and because all its activities war with each other.
The whole life of the psychic self is misery, because it ever waxes and wanes; because birth brings inevitable death; because there is no expectation without its shadow, fear. The life of the psychic self is misery, because it is afflicted with restlessness; so that he who has much, finds not satisfaction, but rather the whetted hunger for more. The fire is not quenched by pouring oil on it; so desire is not quenched by the satisfaction of desire. Again, the life of the psychic self is misery, because it makes ever new dynamic impresses in the mind; because a desire satisfied is but the seed from which springs the desire to find like satisfaction again. The appetite comes in eating, as the proverb says, and grows by what it feeds on. And the psychic self, torn with conflicting desires, is ever the house divided against itself, which must surely fall.
16. This pain is to be warded off, before it has come.
In other words, we cannot cure the pains of life by laying on them any balm. We must cut the root, absorption in the psychical self. So it is said, there is no cure for the misery of longing, but to fix the heart upon the eternal.
17. The cause of what is to be warded off, is the absorption of the Seer in things seen.
Here again we have the fundamental idea of the Sankhya, which is the intellectual counterpart of the Yoga system. The cause of what is to be warded off, the root of misery, is the absorption of consciousness in the psychical man and the things which beguile the psychical man. The cure is liberation.
18. Things seen have as their property manifestation, action, inertia. They form the basis of the elements and the sense-powers. They make for experience and for liberation.
Here is a whole philosophy of life. Things seen, the total of the phenomena, possess as their property, manifestation, action, inertia: the qualities of force and matter in combination. These, in their grosser form, make the material world; in their finer, more subjective form, they make the psychical world, the world of sense-impressions and mind-images. And through this totality of the phenomenal, the soul gains experience, and is prepared for liberation. In other words, the whole outer world exists for the purposes of the soul, and finds in this its true reason for being.
19. The grades or layers of the Three Potencies are the defined, the undefined, that with distinctive mark, that without distinctive mark.
Or, as we might say, there are two strata of the physical, and two strata of the psychical realms. In each, there is the side of form, and the side of force. The form side of the physical is here called the defined. The force side of the physical is the undefined, that which has no boundaries. So in the psychical; there is the form side; that with distinctive marks, such as the characteristic features of mind-images; and there is the force side, without distinctive marks, such as the forces of desire or fear, which may flow now to this mind-image, now to that.