"You are treading on dangerous ground," I replied. "That is a pit-fall that your true investigator avoids. That is why modern science has advanced so slowly. It accepts nothing that it can not demonstrate. But you----" "I would take hashish, opium, all manner of drugs. I would emulate the sages of the East. And then perhaps I would apprehend----" "What?" "The fourth dimension." "Theosophical rubbish!" "Perhaps. But I believe that drugs expand human consciousness. William James agreed with me. And I have discovered a new one." "A new drug?" "It was used centuries ago by Chinese alchemists, but it is virtually unknown in the West. Its occult properties are amazing. With its aid and the aid of my mathematical knowledge I believe that I can _go back through time_." "I do not understand." "Time is merely our imperfect perception of a new dimension of space. Time and motion are both illusions. Everything that has existed from the beginning of the world _exists now_. Events that occurred centuries ago on this planet continue to exist in another dimension of space. Events that will occur centuries from now _exist already_. We can not perceive their existence because we can not enter the dimension of space that contains them. Human beings as we know them are merely fractions, infinitesimally small fractions of one enormous whole. Every human being is linked with _all_ the life that has preceded him on this planet. All of his ancestors are parts of him. Only time separates him from his forebears, and time is an illusion and does not exist." "I think I understand," I murmured. "It will be sufficient for my purpose if you can form a vague idea of what I wish to achieve. I wish to strip from my eyes the veils of illusion that time has thrown over them, and see the _beginning and the end_." "And you think this new drug will help you?" "I am sure that it will. And I want you to help me. I intend to take the drug immediately. I can not wait. I must _see_." His eyes glittered strangely. "I am going back, back through time." He rose and strode to the mantel. When he faced me again he was holding a small square box in the palm of his hand. "I have here five pellets of the drug Liao. It was used by the Chinese philosopher Lao Tze, and while under its influence he visioned Tao. Tao is the most mysterious force in the world; it surrounds and pervades all things; it contains the visible universe and everything that we call reality. He who apprehends the mysteries of Tao sees clearly all that was and will be." "Rubbish!" I retorted. "Tao resembles a great animal, recumbent, motionless, containing in its enormous body all the worlds of our universe, the past, the present and the future. We see portions of this great monster through a slit, which we call time. With the aid of this drug I shall enlarge the slit. I shall behold the great figure of life, the great recumbent beast in its entirety." "And what do you wish me to do?"