An Illusion (n.) is nature's favourite tool: the true goal is hidden behind a deluding image; we reach for the image, and nature reaches its goal through our deception.
An Illusion (n.) is avenged when destroyed: he who destroys it in himself and others is punished by nature, the cruellest tyrant.
An Illusion (n.) tells its loveliest lies about the things that are most similar, because the tiniest gap is hardest to bridge.
An Illusion (n.) that makes happy is more pernicious than one with immediate bad consequences: the latter sharpens reason and makes it mistrustful; the former lulls it to sleep.
Illusion (n.) itself belongs to reality — a trimmed world our practical instincts have worked on; that we can live in it is proof of its truth for us.