"On arrival at any given destination, we can build our bodies from the elements of the foreign planet. We attain our knowledge of conditions on any given planet by absorbing the thought-content of the brains of a few representative members of its dominant race. Every well-balanced mind contains the experience of the race, the essence of the wisdom that the race-soul has gained during its residence in matter. We make this knowledge a part of our own thought-content, and thus the Universe lies like an open book before us. "At the end of a given experiment in thought absorption, we return the borrowed mind-stuff to the brain of its possessor. We reward our subject for his momentary discomfiture by pouring into his body our splendid vitality. This lengthens his life expectancy immeasurably, by literally burning from his system the germs of actual or incipient ills that contaminate the blood-stream. * * * * * "This, I believe, will conclude my explanation, an explanation to which you, as a race in whom intelligence is beginning to dawn, are entitled. But you have a long road to travel yet. Your thought-channels are pitifully blocked and criss-crossed with nonsensical and inhibitory complexes that stand in the way of true progress. But you will work this out, for the Divine Spark that pulses through us of the Larger Universe, pulses also through you. That spark, once lighted, can never be extinguished, can never be swallowed up again in the primeval slime. "There is nothing more that I can learn from you--nothing that I can teach you at this stage of your evolution. I have but one message to give you, one thought to leave with you--forge on! You are on the path, the stars are over you, their light is flashing into your souls the slogan of the Federated Suns beyond the frontiers of your little warring worlds. Forge on!" The Voice died out like the chiming of a great bell receding into immeasurable distance. The supercilious tones of the professor had yielded to the sweetness and the light of the Greater Mind whose instrument he had momentarily become. It was charged at the last with a golden resonance that seemed to echo down vast spaceless corridors beyond the furthermost outposts of time. * * * * * As the Voice faded out into a sacramental silence, the strangely assorted throng, moved by a common impulse, lowered their heads as though in prayer. The great globe pulsed and shimmered throughout its sentient depths like a sea of liquid jewels. Then the tentacle that grasped the professor drew him back toward the scintillating nucleus. Simultaneously another arm reached out and grasped Bill Jones, who, during the strange lecture, had ceased his wooden soldier marching and had stood stiffly at attention.