Who said "The world is full of a number of things"?

This quote is attributed to John Keats.

The world is full of a number of things - John Keats

"The world is full of a number of things"

John Keats

Poet English 1795–1821

"A thing of beauty is a joy forever"

"The poetry of the earth is never dead"

"I am certain of nothing but the holiness of the heart's affections"

"Negative capability is when a man is capable of being in uncertainties without irritably reaching for fact"