The classical allusion in the sentence from Walden is to "Calliope," one of the nine Muses in Greek mythology who presided over eloquence and epic poetry. Thoreau uses this allusion to emphasize the power and beauty of nature in inspiring creativity and contemplation.
I was under the illusion that you were my friend.
The magician's illusion was so convincing that everyone was fooled.
Bob was surprised as the illusion took place right before his eyes.
-- I never heard what compensation he received for that, --
The magician's illusion was so crafty and convincing that the audience did not have a clue as to how he made his assistant vanish.
Artist M.C Escher often used optical illusion . By : a 12 year old
The fog created an optical illusion.
"The magician's illusion was so convincing that everyone was fooled.""The state's financial health was an illusion created by the legislature."The stage magician performed an illusion where he made an elephant disappear.The illusion was so vivid, Sally thought it was real and tried to touch it.
The mirage was just an optical illusion.
A mirage is a common optical illusion.
"The type of music Anne loves is classical music." Okay