And he indeed was, right? What he left us is a lot of questions and ideas, even if expressed without any words (or little words, it's not a pipe for example).

I think that while lovers of philosophy are much ingrained into words as a way of thinking (and why not, we know in fact the importance of "logos"), Magritte's philosophy can appeal to the more creative individuals, but also the ones with more investigative and interpretative spirit, as well as those who like to "think" away from "thinkers".