Muses (sacred poetry) is often seen with a pensive expression; Terpsichore (choral dance and song) is often seen dancing and carrying a lyre; Thalia (comedy) is often seen with a comic mask; and Urania (astronomy) carries a pair of compasses and the celestial globe. Greek "mousa" is a common noun as well as a type of goddess: it literally means "art" or "poetry". According to Pindar, to "carry a "mousa"" is "to excel in the arts". The word derives from the Indo-European root "men-", which is also the source of Greek "Mnemosyne" and "mania", English "mind", "mental" and "monitor", Sanskrit "mantra"
Muses blinding him and robbing him of his singing ability. According to a myth from Ovid's "Metamorphoses"—alluding to the connection of Pieria with the Muses—Pierus, king of Macedon, had nine daughters he named after the nine Muses, believing that their skills were a great match to the Muses. He thus challenged the Muses to a match, resulting in his daughters, the "Pierides", being turned into chattering magpies for their presumption. Pausanias records a tradition of two generations of Muses; the first are the daughters of Ouranos and Gaia, the second of Zeus and Mnemosyne. Another, rarer genealogy is that they are