A man who wishes to learn a little about his existence, and who has no time to waste, is quite embarrassed. He wishes to read simultaneously Hobbes, Spinoza, Bayle who wrote against them, Leibnitz who disputed with Bayle, Clarke who disputed with Leibnitz, Malebranche who differed from them all, Locke who passed as having confounded Malebranche, Stillingfleet who thought he had vanquished Locke, Cudworth who thinks himself above them because he is understood by no one. One would die of old age before having thumbed the hundredth part of the metaphysical romances. One is very content to have the most ancient books, as one inquires into the most ancient medals. It is that which makes the honour of a library. The oldest books in the world are the "Kings" of the Chinese, the "Shastabad" of the Brahmins, of which Mr. Holwell has brought to our knowledge admirable passages, what remains of the ancient Zarathustra, the fragments of Sanchoniathon which Eusebius has preserved for us and which bears the characteristics of the most remote antiquity. I do not speak of the "Pentateuch" which is above all one could say of it. We still have the prayer of the real Orpheus, which the hierophant recited in the old Greek mysteries. "Walk in the path of justice, worship the sole master of the universe. He is one; He is sole by Himself. All beings owe Him their existence; He acts in them and by them. He sees everything, and never has been seen by mortal eyes." St. Clement of Alexandria, the most learned of the fathers of the Church, or rather the only scholar in profane antiquity, gives him almost always the name of Orpheus of Thrace, of Orpheus the Theologian, to distinguish him from those who wrote later under his name. We have no longer anything either of Museus or of Linus. A few passages from these predecessors of Homer would well be an adornment to a library. Augustus had formed the library called the Palatine. The statue of Apollo presided over it. The emperor embellished it with busts of the best authors. One saw in Rome twenty-nine great public libraries. There are now more than four thousand important libraries in Europe. Choose which suits you, and try not to be bored. _LIMITS OF THE HUMAN MIND_ Someone asked Newton one day why he walked when he wanted to, and how his arm and his hand moved at his will. He answered manfully that he had no idea. "But at least," his interlocutor said to him, "you who understand so well the gravitation of the planets will tell me why they turn in one direction rather than in another!" And he again confessed that he had no idea. Those who taught that the ocean was salt for fear that it might become putrid, and that the tides were made to bring our ships into port (The Abbe Pluche in "The Spectacle of Nature"), were somewhat ashamed when the reply was made to them that the Mediterranean has ports and no ebb. Musschenbroeck himself fell into this inadvertence.