Fragment No. 16
Variant translations:
We dream of a journey through the universe. But is the universe then not in us? We do not know the depths of our spirit. Inward goes the secret path. Eternity with its worlds, the past and the future, is in us or nowhere.
As translated in "Bildung in Early German Romanticism" by Frederick C. Beiser, in Philosophers on Education : Historical Perspectives (1998) by Amélie Rorty, p. 294
We dream of journeys through the cosmos — Is the cosmos not then in us? We do not know the depths of our own spirit. — The mysterious path leads within. In us, or nowhere, is eternity with its worlds — the past and the future. 
Blüthenstaub (1798) 
Context: Imagination places the future world for us either above or below or in reincarnation. We dream of travels throughout the universe: is not the universe within us? We do not know the depths of our spirit. The mysterious path leads within. In us, or nowhere, lies eternity with its worlds, the past and the future.
                                    
“Great music is a psychical storm, agitating to fathomless depths the mystery of the past within us.”
             Lafcadio Hearn http://books.google.com/books?id=_DcRAAAAMAAJ&q=%22Great+music+is+a+psychical+storm+agitating+to+fathomless+depths+the+mystery+of+the+past+within+us%22&pg=PA210#v=onepage, The Atlantic Monthly (February 1903) 
Republished in  Shelburne Essays http://books.google.com/books?id=2OMuAQAAIAAJ&q=%22Great+music+is+a+psychical+storm+agitating+to+fathomless+depths+the+mystery+of+the+past+within+us%22&pg=PA64#v=onepage, volume 2 (1905)
        
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Paul Elmer More 1
American journalist, critic, essayist and Christian apologi… 1864–1937Related quotes
                                        
                                        Vol. VII, par. 547 
Collected Papers (1931-1958) 
Context: Our whole past experience is continually in our consciousness, though most of it sunk to a great depth of dimness. I think of consciousness as a bottomless lake, whose waters seem transparent, yet into which we can clearly see but a little way.
                                    
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 261.
                                        
                                        letter from Paris to Rockwell Kent, August 22, 1912,  Archives of American Art; as quoted in Marsden Hartley, by Gail R. Scott, Abbeville Publishers, Cross River Press, 1988, New York p. 42 
1908 - 1920
                                    
“Q: What great singers of the past do you wish had sung your music?”
“Music should humbly seek to please; within these limits great beauty may perhaps be found.”
                                        
                                        Quoted in French Music : From the Death of Berlioz to the Death of Fauré (1951) by Martin Cooper, p. 136, and in Debussy and Wagner (1979) by Robin Holloway, p. 207 
Context: Music should humbly seek to please; within these limits great beauty may perhaps be found. Extreme complication is contrary to art. Beauty must appeal to the senses, must provide us with immediate enjoyment, must impress us or insinuate itself into us without any effort on our part.