“Great art is the outward expression of an inner life in the artist, and this inner life will result in his personal vision of the world... The inner life of a human being is a vast and varied realm.”

Meditation:Insights and Inspirations (2010) https://books.google.com/books?id=s2ctBgAAQBAJ,

Quoted in: Sunil Goonasekera (1991) George Keyt, Interpretations. p. 146
Talking about the means in painting
1910 - 1915, Concerning the Spiritual in Art, 1911

All Will be Well (2004)

1980 - 2000, The Skowhegan Lecture', 1987

Variant: Sometimes our light goes out but is blown again into flame by an encounter with another human being. Each of us owes the deepest thanks to those who have rekindled this inner light.

Source: 1950's, Interview by William Wright, Summer 1950, pp. 139-140

quote from Franz Marc's note in 1907, he wrote down on his return from Paris; as cited by de:Wolf-Dieter Dube, in Expressionism; Praeger Publishers, New York, 1973, p. 126
1905 - 1910

As quoted in ‘Interview with J. G. Ballard’, Munich Round Up, 100 (1968), with translation by Dan O’Hara http://www.ballardian.com/munich-round-up-interview-with-jg-ballard <br class="br">Context: I define Inner Space as an imaginary realm in which on the one hand the outer world of reality, and on the other the inner world of the mind meet and merge. Now, in the landscapes of the surrealist painters, for example, one sees the regions of Inner Space; and increasingly I believe that we will encounter in film and literature scenes which are neither solely realistic nor fantastic. In a sense, it will be a movement in the interzone between both spheres.