In addition to this, the new theory of matter has entirely over thrown the old conception of the unchanging atoms, and they are now regarded to be composed of magnetic forces, ions, and corpuscles in incessant motion. Therefore we have no inert matter in the concrete, no unchanging thing in the sphere of experience, no constant organism in the transient universe. These considerations often led many thinkers, ancient and modern, to the pessimistic view of life. What is the use of your exertion, they would say, in accumulating wealth, which is doomed to melt away in the twinkling of an eye? What is the use of your striving after power, which is more short-lived than a bubble? What is the use of your endeavour in the reformation of society, which does not endure any longer than the castle in the air? How do kings differ from beggars in the eye of Transience? How do the rich differ from the poor, how the beautiful from the ugly, bow the young from the old, how the good from the evil, how the lucky from the unlucky, how the wise from the unwise, in the court of Death? Vain is ambition. Vain is fame. Vain is pleasure. Vain are struggles and efforts. All is in vain. An ancient Hindu thinker[FN#144] says: "O saint, what is the use of the enjoyment of pleasures in this offensive, pithless body--a mere mass of bones, skins, sinews, marrow, and flesh? What is the use of the enjoyment of pleasures in this body, which is assailed by lust, hatred, greed, delusion, fear, anguish, jealousy, separation from what is loved, union with what is not loved, hunger, old age, death, illness, grief, and other evils? In such a world as this, what is the use of the enjoyment of pleasures, if he who has fed on them is to return to this world again and again? In this world I am like a frog in a dry well." [FN#144] Maitrayana Upanisad. It is this consideration on the transitoriness of life that led some Taoist in China to prefer death to life, as expressed in Chwang Tsz (Su-shi):[FN#145] "When Kwang-zze went to Khu, he saw an empty skull, bleached indeed, but still retaining its shape. Tapping it with his horse-switch, he asked it saying: 'Did you, sir, in your greed of life, fail in the lessons of reason and come to this? Or did you do so, in the service of a perishing state, by the punishment of an axe? Or was it through your evil conduct, reflecting disgrace on your parents and on your wife and children? Or was it through your hard endurances of cold and hunger? Or was it that you had completed your term of life?'