a matter of teys.t

MUSE, n. s as z. [L. musa.]

1. Properly, song; but in usage, the deity or power of poetry. Hence poets in modern times, as in ancient, invoke the aid of the Muse or Muses, or in other words,the genius of poetry.
2. Deep thought; close attention or contemplation which abstracts the minds from passing scenes; hence sometimes, absence of mind. — Noah Webster-1828 Dictionary