“Nature which governs the whole will soon change all things which thou seest, and out of there substance will make other things, and again other things from the substance of them, in order that the world may ever be new.”

Source: Meditations (c. AD 121–180), Book X, 17

Kant's Inaugural Dissertation (1770), Section IV On The Principle Of The Form Of The Intelligible World

Introductory Epistle
On the Infinite Universe and Worlds (1584)

Source: The Vision and the Voice: With Commentary and Other Papers

i. 17, f. 18^r
Commentarius in Posteriorum Analyticorum Libros (c. 1217-1220)

Works, VII, 17.
Context: The great thing however is, in the show of the temporal and the transient to recognize the substance which is immanent and the eternal which is present. For the work of Reason (which is synonymous with the Idea) when considered in its own actuality, is to simultaneously enter external existence and emerge with an infinite wealth of forms, phenomena and phases — a multiplicity that envelops its essential rational kernel with a motley outer rind with which our ordinary consciousness is earliest at home. It is this rind that the Concept must penetrate before Reason can find its own inward pulse and feel it still beating even in the outward phases. But this infinite variety of circumstances which is formed in this element of externality by the light of the rational essence shining in it — all this infinite material, with its regulatory laws — is not the object of philosophy.... To comprehend what is, is the task of philosophy: and what is is Reason.

VII, 9
Meditations (c. 121–180 AD), Book VII

As translated by Arthur Imerti (1964)
The Expulsion of the Triumphant Beast (1584)

note in Mondrian's sketchbook II, 1912/13; as quoted in Two Mondrian sketchbooks 1912 - 1914, ed. Robert P. Welsh & J. M. Joosten, Amsterdam 1969 op. cit. (note 31), p. 61
1910's