The following is the very amusing anti-Platonic paragraph in chapter 20 of Revolt of the Angels (full review here):
“While the little children played at hop-scotch under the Abbey walls our friends the monks devoted themselves to another game equally unprofitable, at which, nevertheless, I joined them, for one must kill time,—that, when one comes to think of it, is the sole business of life. Our game was a game of words which pleased our coarse yet subtle minds, set school fulminating against school, and… put all Christendom in an uproar. We formed ourselves into two opposing camps. One camp maintained that before there were apples there was the Apple; that before there were popinjays there was the Popinjay; that before there were lewd and greedy monks there was the Monk, Lewdness and Greed; that before there were feet and before there were posteriors in this world the kick in the posterior must have had existence for all eternity in the bosom of God. The other camp replied that, on the contrary, apples gave man the idea of the apple; popinjays the idea of the popinjay; monks the idea of the monk, greed and lewdness, and that the kick in the posterior existed only after having been duly given and received. The players grew heated and came to fisticuffs. I was an adherent of the second party, which satisfied my reason better, and which was, in fact, condemned by the Council of Soissons.