The least one can say is that everything that is built up between these animals known as humans is constructed, manufactured, and founded on language. [...] We cannot fail to observe that the thing which holds human beings together [...] is something related to language. I call discourse that ‘something.’ [Discourse is that something] which within language fixes, crystallizes, and uses the resources of language.
Works and Dayz
The art work is, to be sure, a thing that is made, but it says something other than the mere thing itself is, allo agoreuei. The work makes public something other than itself; it manifests something other; it is an allegory. In the work of art something other is brought together with the thing that is made. To bring together is, in Greek, sumballein. The work is a symbol.
Martin Heidegger (LX:5)
I offer these, here, without comment or explanation.
To paraphrase Sylvain Lévi: when you have one listener, it's teaching; when you have two, it's popularization.