“My music must be an artistic reproduction of human speech in all its finest shades. That is, the sounds of human speech, as the external manifestations of thought and feeling must, without exaggeration or violence, become true, accurate music.”

This is Your Brain on Music (2006)
Context: Music may be the activity that prepared our pre-human ancestors for speech communication and for the very cognitive, representational flexibility necessary to become humans.

Read from his musical diaries while speaking at St. Vladimir’s Seminary https://vimeo.com/221011528/

Choruses from The Rock (1934)

As quoted in Through Music to the Self : How to Appreciate and Experience Music Anew (1979) by Peter Michael Hamel, p. 18
Context: Elemental Music is never just music. It's bound up with movement, dance and speech, and so it is a form of music in which one must participate, in which one is involved not as a listener bust as a co-performer. It is pre-rational, has no over-all form, no architectonics, involves no set sequences, ostinati or minor rondo-forms. Elemental Music is earthy, natural, physical, capable of being learnt and experienced by anybody, child's play.... Elemental Music, word and movement, play, every-thing that awakens and develops the powers of the soul builds up the humus of the soul, the humus without which we face spiritual soil-erosion.... we face spiritual soil-erosion when man estranges himself from the elemental and loses his balance.

"The Next Poem" http://www.danagioia.net/poems/thenextpoem.htm
Poetry, The Gods of Winter (1991)

Source: Cours de linguistique générale (1916), p. 6

"The Neglected Plane of Wisdom" (1966), p. 250
Sun Ra : The Immeasurable Equation (2005)

Part II: Letters (1887 - 1901) TO MRS. LAURENCE HUTTON Wrentham, February 20, 1898.
The Story of My Life (1903)