"I am certain of nothing but the holiness of the heart's affections, and the truth of imagination." — John Keats

Our truest life is when we are in dreams awake

Source: A Week on the Concord and Merrimack Rivers (1849)

Every thing possible to be believed is an image of truth

Source: The Marriage of Heaven and Hell (1790-1793)

It is a truth universally acknowledged, that a single man in possession of a good fortune, must be in want of a wife

Source: Pride and Prejudice (1813)

A thing is not necessarily true because a man dies for it.

Source: Miscellaneous Aphorisms (1911)

If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.

Source: Walden (1854)

There is no charm equal to tenderness of heart

Source: Emma (1815)

John Keats Quote