Furthermore, the amount of resistance that a lamp interposes to the free circulation of the current through it has its effect upon the light it gives. One lamp may yield a fine light, and another on the same circuit may afford but poor illumination: the one expresses well, and the other ill. So, too, with the grass, one patch may be free-growing and another may be but poor stuff: one expresses well, and the other feebly. In the same way with ourselves, if our bodies have the life force circulating freely they express robust health: and if the force find but a constricted channel, then our bodies express health in scanty measure and approximate more to disease than to the normal well-being. Our bodies are no more independent organisms than is the lamp bulb: they express the spirit which is the essence of the self, and when that self withdraws the body is as dead as the grass or the worn-out bulb. Yet the failure of the bulb casts no reflection upon the generating station, for the current is still there. We do not need to assume that the current has failed, for in that case it would fail alike for every bulb upon the circuit. If every form and phase of life were to expire and cease at a given moment, we might then, and then only, be justified in assuming that spirit had ceased to be: but in that case there would be but little need for us to worry about the point. We may imagine spirit as the driving force behind everything, as the urge towards evolution, as the pent-up intelligence which ever seeks one variation and then another. Then, when one variation appears, more appropriate to its surroundings than others, this, because of its fitness, survives. As human beings we are individualised fragments of the great universal spirit. There is only the one life and the one spirit, but there are diversities of gifts to enable that spirit to be expressed. The grass expresses it in its luxuriance, its colour, and its growth: the birds in their song: and the whole of what we are pleased to term the lower creation bespeaks this spirit in the daily activity. When this expression ceases, the thing that was once alive is dead.