“The reckoning with idealism as a view of life is universal, but it also touches on something central in art-its life's substance. One must understand that it is impossible to distinguish between a picture’s form and its substance. As the flower's structure is governed by the intentional tension (when it loses the sap the form is lost), so also with art the substance creates the tension. Form and substance are one and the same. Form is the life expression and substance the living painting.”

Source: 1920s, "Picasso Speaks" (1923), p. 323.

Quote from De Cirico's text 'A DISCOURSE ON THE MATERIAL SUBSTANCE OF PAINT', 1942 http://www.fondazionedechirico.org/wp-content/uploads/541-547Metafisica5_6.pdf, p. 542
1920s and later

Source: Guide for the Perplexed (c. 1190), Part III, Ch.8

Source: Guide for the Perplexed (c. 1190), Part III, Ch.8

"The Truth of Orthodoxy" as translated in Vestnik of the Russian West European Patriarchal Exarchate (1952) http://www.kosovo.net/ortruth.html
Context: The Christian world doesn't know Orthodoxy too well. It only knows the external and for the most part, the negative features of the Orthodox Church and not the inner spiritual treasure. Orthodoxy was locked inside itself, it did not have the spirit of proselytism and did not reveal itself to the world. For the longest time, Orthodoxy did not have such world-wide significance as did Catholicism and Protestantism. It remained apart form passionate religious battles for hundreds of years, for centuries it lived under the protection of large empires (Byzantium and Russia), and preserved its eternal truth from the destructive processes of world history. It is characteristic of Orthodoxy's religious nature that it was not sufficiently actualized nor exposed externally, it was not militant, and precisely because of this the heavenly truth of Christian revelation was not distorted so much. Orthodoxy is that form of Christianity which suffered the least distortion in its substance as a result of human history. The Orthodox Church had its moments of historical sin, for the most part in connection with its external dependence on the State, but the Church's teaching, her inner spiritual path was not subject to distortion. The Orthodox Church is primarily the Church of tradition, in contrast to the Catholic Church, which is the Church of authority, and to the Protestant Churches which are essentially churches of individual faith. The Orthodox Church was never subject to a single externally authoritarian organization and it unshakenly was held together by the strength of internal tradition and not by any external authority. Out of all forms of Christianity it is the Orthodox Church which remained more closely tied to early Christianity.

Source: Vestiges of the Natural History of Creation (1844), p. 35
Context: It is remarkable of the simple substances that they are generally in some compound form. Thus oxygen and nitrogen, though in union they form the aerial envelope of the globe, are never found separate in nature. Carbon is pure only in the diamond. And the metallic bases of the earths, though the chemist can disengage them, may well be supposed unlikely to remain long uncombined, seeing that contact with moisture makes them burn. Combination and re-combination are principles largely pervading nature. There are few rocks, for example, that are not composed of at least two varieties of matter, each of which is again a compound of elementary substances. What is still more wonderful with respect to this principle of combination, all the elementary substances observe certain mathematical proportions in their unions. It is hence supposed that matter is composed of infinitely minute particles or atoms, each of which belonging to any one substance, can only (through the operation of some as yet hidden law) associate with a certain number of the atoms of any other.

Source: Guide for the Perplexed (c. 1190), Part III, Ch.8

On Eagle's Wings, 1977, p. 118
As of a Trumpet, On Eagle's Wings

Quote from De Cirico's text 'A DISCOURSE ON THE MATERIAL SUBSTANCE OF PAINT', 1942 http://www.fondazionedechirico.org/wp-content/uploads/541-547Metafisica5_6.pdf, p. 542
1920s and later