My soul, my soul, where are you? Do you hear me? I speak, I call you—are you there? I have returned, here I am again. I have shaken the dust of all the lands from my feet, and I have come to you again, I am with you. After long years of long wandering, I have come to you anew. Shall I tell you everything I have seen, experienced, and drunk in? Or do you not want to hear about all the noise of life and the world? But one thing you must know, the one thing I have learned is that one must live this life. This life is the way, the long sought-after way to the unfathomable, which we call "divine". There is no other way. All other ways are false paths.
I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived. I did not wish to live what was not life, living is so dear; nor did I wish to practise resignation, unless it was quite necessary. I wanted to live deep and suck out all the marrow of life, to live so sturdily and Spartan-like as to put to rout all that was not life, to cut a broad swath and shave close, to drive life into a corner, and reduce it to its lowest terms, and, if it proved to be mean, why then to get the whole and genuine meanness of it, and publish its meanness to the world; or if it were sublime, to know it by experience, and be able to give a true account of it in my next excursion. For most men, it appears to me, are in a strange uncertainty about it, whether it is of the devil or of God, and have somewhat hastily concluded that it is the chief end of man here to "glorify God and enjoy him forever."
I study myself more than any other subject. That is my metaphysics; that is my physics.