Excerpted from a much larger collection here.

Ink runs from the corners of my mouth
There is no happiness like mine.
I have been eating poetry.
~Mark Strand, “Eating Poetry,” Reasons for Moving, 1968

Science is for those who learn; poetry, for those who know. ~Joseph Roux, Meditations of a Parish Priest

Poetry heals the wounds inflicted by reason. ~Novalis

There is poetry as soon as we realize that we possess nothing. ~John Cage

Genuine poetry can communicate before it is understood. ~T.S. Eliot, Dante, 1920

Poetry is nearer to vital truth than history. ~Plato, Ion

Poetry is just the evidence of life. If your life is burning well, poetry is just the ash. ~Leonard Cohen

Poetry is a deal of joy and pain and wonder, with a dash of the dictionary. ~Kahlil Gibran

There’s no money in poetry, but then there’s no poetry in money, either. ~Robert Graves, 1962 interview on BBC-TV, based on a very similar statement he overheard around 1955

Poetry is what gets lost in translation. ~Robert Frost

Imaginary gardens with real toads in them. ~Marianne Moore’s definition of poetry, “Poetry,” Collected Poems, 1951

“Most poems are never finished,” (I was defensive). He sighed: “No, most poems are never started.” ~Dr. Sun Wolf

He who draws noble delights from sentiments of poetry is a true poet, though he has never written a line in all his life. ~George Sand, 1851

Poets are soldiers that liberate words from the steadfast possession of definition. ~Eli Khamarov, The Shadow Zone

Poetry is a mirror which makes beautiful that which is distorted. ~Percy Shelley, A Defence of Poetry, 1821

Poetry is the key to the hieroglyphics of Nature. ~Augustus William Hare and Julius Charles Hare, Guesses at Truth, by Two Brothers, 1827

It is the job of poetry to clean up our word-clogged reality by creating silences around things. ~Stephen Mallarme

I am looking for a poem that says Everything so I don’t have to write anymore. ~Tukaram

You can’t write poetry on the computer. ~Quentin Tarantino

Poetry is perfect verbs hunting for elusive nouns. ~J. Patrick Lewis, http://www.jpatricklewis.com

A poem should not mean
But be.
~Archibald MacLeish, Ars Poetica, 1926

A true poet does not bother to be poetical. Nor does a nursery gardener scent his roses. ~Jean Cocteau

Poets are masters of us ordinary men, in knowledge of the mind, because they drink at streams which we have not yet made accessible to science. ~Sigmund Freud, quoted in A Dictionary of Scientific Quotations by Alan L. Mackay, 1991

To be a poet is a condition, not a profession. ~Robert Frost

Poetry is the synthesis of hyacinths and biscuits. ~Carl Sandburg

Poetry is the art of uniting pleasure with truth. ~Samuel Johnson

I’ve written some poetry I don’t understand myself. ~Carl Sandburg

The poet is a liar who always speaks the truth. ~Jean Cocteau

The poetry of the earth is never dead. ~John Keats

Poetry is frosted fire. ~J. Patrick Lewis, http://www.jpatricklewis.com

If you know what you are going to write when you’re writing a poem, it’s going to be average. ~Derek Walcott

A poet dares be just so clear and no clearer…. He unzips the veil from beauty, but does not remove it. A poet utterly clear is a trifle glaring. ~E.B. White

The poet… may be used as a barometer, but let us not forget that he is also part of the weather. ~Lionel Trilling, The Liberal Imagination, 1950

Poetry is language at its most distilled and most powerful. ~Rita Dove

A poet’s work is to name the unnameable, to point at frauds, to take sides, start arguments, shape the world, and stop it going to sleep. ~Salman Rushdie

Poetry is plucking at the heartstrings, and making music with them. ~Dennis Gabor

Your prayer can be poetry, and poetry can be your prayer. ~Terri Guillemets