The art of thinking, my dear Eugene, is not so easy. For this reason I keep on warning you against misunderstanding. I do not mean to advise you with the foregoing against admiring any single part of nature, or of art, a landscape or a statue. My teaching merely tends to moderate admiration by the reflection that the whole world is wonderful, that everything is beautiful, so that nothing ugly remains. The distinction between beautiful and ugly is only relative. Even when I say that the true worship of God, the cult of truth, cannot begin until idol worship ceases, you will appreciate the phrase and will not insinuate that I do not value the cultivation of science in the past, or that I hate idol worship to the extent of forgetting what I have emphasized repeatedly, viz., that idol worship is also worship of God, and error a paving stone on the way toward truth. The most minute thing is a magnitude. Everything is true, good, and beautiful, for the universe is absolute truth, beauty and goodness. I conclude with the words of Fr. von Sallet: A sunny view of world and life Is balm for brain and heart, It is with health and beauty rife, With noblest works of art. But do not for a moment think That it is captured in a wink. The golden harvest does not grow, Unless the early tempests blow. And only bitter woe and strain Will bright and lofty wisdom gain. FOOTNOTE: [7] E. g. That of natural existence.--EDITOR. SEVENTEENTH LETTER. My subject, dear Eugene, is the simplest in the world, but it requires thorough treatment for all its full understanding. So every letter is in a way but a repetition of the same argument. "It is remarkable," says Schopenhauer, "that we find the few main theses of pre-socratic philosophy repeated innumerable times. Also in the works of modern thinkers, such as Cartesius, Spinoza, Leibniz, and even Kant, we find that their few main theses are repeated over and over." Now I ask you to consider what I said in my first letters, viz., that the titles of the principal philosophical works reveal that philosophy is engaged in the study of logic, in the analysis of the intellect and the art of its use. You will then recognize that in the very nature of the subject my presentation of the matter lacks systematization. It has no real beginning and end, because its object, the intellect, is interconnected with the whole universe, which is without beginning and end, which has neither before nor after, neither above nor below. You may venture that the relation of the intellect to the universe does not concern the intellect especially, but is a universal matter. That would be true. But it is easy to show that the art of thinking and wisdom of the world are identical. And although the universal interrelation of things is germain to all things and subjects, yet its consideration is a special task of logic which treats all objects of thought summarily.