“Ladislao de Gauss significantly marks the local scene both as a portraitist and as a landscape artist…”

in, 'Paul Joseph Constantin Gabriël 1828-1903. Colorist van de Haagse School', ed. M. Peters & B. Tempel; exposition catalog - Dordrecht, Dordrechts Museum / Kleef, Stichting B.C. Koekkoek-Huis, Zwolle 1998, p. 46
Paul Gabriël described himself frequently in this way, in French!
undated quotes

Part 1, sect. 29.
Theory of Numbers, 1892

Source: Unbought and Unbossed (1970), p. 160.

As quoted in "New York at Work; Puppeteer Creates Shows for Grown-Ups" by N. R. Kleinfield The New York Times (2 July 1991) http://www.nytimes.com/1991/07/02/nyregion/new-york-at-work-puppeteer-creates-shows-for-grown-ups.html
Context: We have a ways to go in understanding the power of puppetry … Our problem is for too long we have thought of puppets being for children. … The appeal of puppetry to me is it's much more freeing for an artist … Puppetry is a completely controllable means to attack your characters in every possible way. The artist has the possibility to create a much larger landscape with puppetry. The human becomes more human in that sense. Another of the great things about puppetry is the ability to transform.

Book XLII: Ch. 18: A summary of the changes which have occurred around the globe in my lifetime
Mémoires d'outre-tombe (1848 – 1850)
Context: New storms will arise; one can believe in calamities to come which will surpass the afflictions we have been overwhelmed by in the past; already, men are thinking of bandaging their old wounds to return to the battlefield. However, I do not expect an imminent outbreak of war: nations and kings are equally weary; unforeseen catastrophe will not yet fall on France: what follows me will only be the effect of general transformation. No doubt there will be painful moments: the face of the world cannot change without suffering. But, once again, there will be no separate revolutions; simply the great revolution approaching its end. The scenes of tomorrow no longer concern me; they call for other artists: your turn, gentlemen!
As I write these last words, my window, which looks west over the gardens of the Foreign Mission, is open: it is six in the morning; I can see the pale and swollen moon; it is sinking over the spire of the Invalides, scarcely touched by the first golden glow from the East; one might say that the old world was ending, and the new beginning. I behold the light of a dawn whose sunrise I shall never see. It only remains for me to sit down at the edge of my grave; then I shall descend boldly, crucifix in hand, into eternity.

Source: The Internet Galaxy - Reflections on the Internet, Business, and Society (2001), Chapter 4, Virtual Communities or Network Society?, p. 122

Book Depository interview with Mark Thwaite 2009
Other Quotes

(original Dutch, citaat van B.C. Koekkoek:) Het doel van den schilder is, naar mijn wijze van zien, in zoverre met dat des dichters gelijk, dat beiden op het gevoel van den beschouwer of den lezer willen werken. Dit kunnen zij onmogelijk doen, zodra hunne taferelen.. ..den stempel der natuur, de waarheid missen.. .De Nederlandschee schilder gevoelt even goed als de Duitsche den invloed der verhevenen natuur, maar de Nederlander wil eerst met het 'eenvoudige ware' bekend zijn, om hetzelve later met dichterlijke te vereenigen..
Source: Herinneringen aan en Mededeelingen van…' (1841), p. 29-30

W. W. Rouse Ball, History of Mathematics, (London, 1901), p. 463;