4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
12165 | Romantics say music expresses ideas, or the Will, or intuitions, or feelings [Scruton] |
12164 | Expressing melancholy is a good thing, but arousing it is a bad thing [Scruton] |
1497 | For Anaximenes nature is air, which takes different forms by rarefaction and condensation [Anaximenes, by Simplicius] |