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4all these, visible as well as invisible, have their fixed seasons, six of the signs turning above the earth, the remaining six below it; which latter are hidden by the earth. Six of them, however, are always above the earth; for the portion of the last sign, which by the revolution is depressed below the earth and hidden by it, is on the opposite side equal to that of a fresh sign emerging from darkness by the force of the moving power; since it is the same power and motion which cause the rising and setting at the same moment.
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