We understand the proud traits and solitary nature of sages such as Heraclitus. They were able to say proudly of themselves that much had been revealed to them, for they did not attribute their knowledge to their transitory personality, but to the eternal daimon within them. Their pride had as a necessary adjunct the stamp of humility and modesty, expressed in the words, "All knowledge of perishable things is in perpetual flux like the things themselves." Heraclitus calls the eternal universe a play, he could also call it the most serious of realities. But the word "earnest" has lost its force through being applied to earthly experiences. On the other hand, the realisation of "the play of the eternal" leaves man that security in life of which he is deprived by that earnest which has come out of transitory things. A different conception of the universe from that of Heraclitus grew up, on the basis of the Mysteries, in the community founded by Pythagoras in the 6th century B.C. in Southern Italy. The Pythagoreans saw the basis of things in the numbers and geometrical figures of which they investigated the laws by means of mathematics. Aristotle says of them: "They first studied mathematics, and, quite engrossed in them, they considered the elements of mathematics to be the elements of all things. Now as numbers are naturally the first thing in mathematics, and they thought they saw many resemblances in numbers to things and to development, and certainly more in numbers than in fire, earth, and water, in this way one quality of numbers came to mean for them justice, another, the soul and spirit, another, time, and so on with all the rest. Moreover they found in numbers the qualities and connections of harmony; and thus everything else, in accordance with its whole nature, seemed to be an image of numbers, and numbers seemed to be the first thing in nature."