Who said "How wonderful is Death! Death and his brother Sleep!"?

This quote is attributed to Percy Bysshe Shelley.

How wonderful is Death! Death and his brother Sleep! - Percy Bysshe Shelley

"How wonderful is Death! Death and his brother Sleep!"

Percy Bysshe Shelley Death

Poet English 1792–1822

"The greatest instrument of moral good is the imagination."

"We are all born for love. It is the principle of existence and its only end."

"Ah, sweet Content, where dost thou dwell?"

"The mind in creation is as a fading coal."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."