version in original Dutch / citaat van Paul Gabriël, in Nederlands: Wees wat, weest U zelve, zoo niet gooi uw palet in ’t vuur. Vormt een school zoo ge wilt, maar het moet uit U komen, maar gij zelve mag tot geen school behooren.
In a letter of Gabriël, Brussel (14 Oct. 1879), to his student then Willem Bastiaan Tholen; in Gabriël, P.J.C, ed. Jeltes, H.F.W.; Gebroeders Binger, Amsterdam 1926; as cited in  an excerpt of RKD Archive, The Hague https://rkd.nl/explore/excerpts/136 
1860's + 1870's
                                    
“Be something, be yourself; if not, ]then] throw your palette in the fire. Form a school if you wish, but it must come from the inside of you, but you yourself may not belong to any school.”
            translation from the Dutch original: Fons Heijnsbroek 
version in original Dutch / citaat van Paul Gabriël, in Nederlands: Wees wat, weest U zelve, zoo niet gooi uw palet in ’t vuur. Vormt een school zoo ge wilt, maar het moet uit U komen, maar gij zelve mag tot geen school behooren. 
In a letter of Gabriël, Brussel (14 Oct. 1879), to his student then Willem Bastiaan Tholen; in Gabriël, P.J.C, ed. Jeltes, H.F.W.; Gebroeders Binger, Amsterdam 1926; as cited in  an excerpt of RKD Archive, The Hague https://rkd.nl/explore/excerpts/136 
1860's + 1870's
        
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Paul Gabriël 12
painter (1828-1903) 1828–1903Related quotes
Aphorisms
“Light yourself on fire with passion and people will come from miles to watch you burn.”
                                        
                                        As quoted in The Peaceful Path of Prosperity : Practical and Spiritual Approaches to Enrich Your Life with Your Inner Wealth (2001) by Danny Babineaux; not found in any record of Wesley before 2001. 
Misattributed 
Variant: I set myself on fire and people come to watch me burn.
                                    
On "The Heart is a Drum Machine" Documentary
Q&A with Downton Abbey creator Julian Fellowes https://britishheritage.com/interviews/downton-abbey-julian-fellowes (July 22, 2021)
                                        
                                        Memoirs (trans. Machen 1894), book 1 (Venetian Years),  chap. 14 http://etext.library.adelaide.edu.au/c/casanova/c33m/chapter14.html 
Referenced
                                    
"'Revolution as a New Beginning': An Interview with Grace Lee Boggs" http://web.archive.org/web/20070415072944/http://oat.tao.ca/~tom/journal/uta1_sequential.pdf. Upping the Anti No. 1. p. 28. March 31, 2005. Interview conducted at Boggs's home in Detroit, Michigan, July 22, 2003. (Web archives http://uppingtheanti.org/journal/article/01-revolution-as-a-new-beginning/ http://web.archive.org/web/20081030014009/http://uppingtheanti.org/node/1280)