“As our planet revolves once a year around the sun and at the same time turns once in every twenty-four hours upon its own axis, thus traversing minor circles within a larger one, so is the work of the smaller cyclic periods accomplished and recommenced, within the Great Saros.
The revolution of the physical world, according to the ancient doctrine, is attended by a like revolution in the world of intellect – the spiritual evolution of the world proceeding in cycles, like the physical one.
Thus we see in history a regular alternation of ebb and flow in the tide of human progress. The great kingdoms and empires of the world, after reaching the culmination of their greatness, descend again, in accordance with the same law by which they ascended;
till, having reached the lowest point, humanity reasserts itself and mounts up once more, the heights of its attainment being, by this law of ascending progression by cycles, somewhat higher than the point from which it had before descended.”
H. P. Blavatsky