Answer:
Live each day to the fullest because it may be the last one.
Grotto a small picturesque cave especially an artificial one in a park or garden
The main theme is the fragility of sanity, guilt versus innocence, and the unrelenting passage of time. The fragility of sanity: the narrator's attempt to prove his sanity, his erratic mannerisms while he explains his meticulous plans for killing the old man only prove his madness.
Ok
20 word limit sucks, so I’ll just say that I hope you’re doing okay. Stay safe out there, bro.
