Not deep the Poet sees, but wide.

-Arnold, Matthew
  The Strayed Reveller, and Other Poems,'Resignation', l.214.

I heard the church bells hollowing out the sky Deep beyond deep, like never-ending stars.

-Betjeman, SirJohn
  Summoned By Bells, ch.1.

Deep calleth unto deep at the noise of thy waterspouts: all thy waves and thy billows are gone over me.

-Bible (Old Testament)
Psalms 42:7.

They that go down to thesea in ships, that do business in great waters; These see the works of the L, and his wonders in the deep.

-Bible (Old Testament)
ORDPsalms107:23^4.

We therefore commit his body to the deep, to be turned into corruption, looking for theresurrection of the body, (when the Sea shall give up her dead).

-Book of Common Prayer
Forms of Prayer to be Used at Sea,  At the Burial of their Dead at Sea.

O could I flow like thee, and make thy stream My great example, as it is my theme! Though deep, yet clear, though gentle, yet not dull, Strong without rage, without o'erflowing full.

-Denham, SirJohn
  Of the Thames. Cooper's Hill, l.189^92.

The police dog of American fiction, except that his hatred isnottheresultof mere crabbednessbut of aneye that sees too deep for comfort.

-Fadiman, Clifton
Of US writer Ring Lardner. Quoted in Scott Meredith George S Kaufman and His Friends (1974).

Than these November skies Is no sky lovelier. The clouds are deep; Into their grey the subtle spies Of colour creep, Changing their high austerity to delight, Till ev'n the leaden interfolds are bright.

-Freeman,John
  'November Skies'.

   And everyone will say, As you walk your mystic way, 'If this young man expresses himself in terms too deep for me, Why, what a very singularly deep young man this deep young man must be!'

-Gilbert, Sir W(illiam) S(chwenck)
Bunthorne's song, Patience, act1.

Who, too deep for his hearers, still went on refining, And thought of convincing, while they thought of dining; Though equal to all things, for all things unfit, Too nice for a statesman, too proud for a wit.

-Goldsmith, Oliver
  Of Edmund Burke. Retaliation, l.29^32.

You would not find out the boundaries of the soul, even by travelling along every path: so deepa measure doesit have.

-Heraclitus   fl.500
c.500  BC   Quoted in Kirk, Raven and Schofield (eds)  The Presocratic Philosophers (1957), ch.6.

Clear writers, like clear fountains, do not seem so deep as they are; the turbid look the most profound.

-Landor,Walter Savage
  Imaginary Conversations of Literary Men and Statesmen, 'Southey and Porson'.

Where were ye Nymphs when the remorseless deep Clos'd o'er the head of your lov'd Lycidas?

-Milton,John
  Lycidas, l.50^1.

Which way I fly is hell; myself am hell; And in the lowest deep a lower deep Still threat'ning to devour me opens wide, To which the hell I suffer seems a heav'n.

-Milton,John
  Satan. Paradise Lost (published1667), bk.4, l.75^8.

This having learnt, thou hast attained the sum Of wisdom; hope no higher, though all the stars Thou knew'st by name, and all th'ethereal powers, All secrets of the deep, all nature's works, Or works of God in heav'n, air, earth, or sea, And all the riches of this world enjoy'dst, And all the rule, one empire; onlyadd Deeds to thy knowledge answerable, add faith, Add virtue, patience, temperance, add love, By name to come called charity, the soul Of all the rest: then wilt thou not be loath To leave this Paradise, but shalt possess A paradise within thee, happier far.

-Milton,John
  Michael to  Adam. Paradise Lost (published1667), bk.12, l.575^87.

I always say beauty is only sin deep.

-Saki pseudonym of  Hector Hugh Munro
  Reginald,'Reginald's ChoirTreat'.

Two voices are there: one is of the deep; It learns the storm-clouds thundrous melody, Now roars, now murmurs with the changing sea, Now bird-like pipes, now closes soft in sleep: And one is of an old half-witted sheep Which bleats articulate monotony, And indicates that two and one are three, That grass isgreen, lakes damp, and mountains steep And,Wordsworth, both are thine.

-Stephen,J(ames) K(enneth)
  Lapsus Calami,'A Sonnet'.

Below the thunders of the upper deep; Far, far beneath in the abysmal sea, His ancient, dreamless, uninvaded sleep The Kraken sleepeth.

-Tennyson
  Poems, Chiefly Lyrical,'The Kraken', l.1^4.

And now by the side of the Black and the Baltic deep, And deathful-grinning mouths of the fortress, flames The blood-red blossom of war with a heart of fire.

-Tennyson
  Maud, pt.3, sect.6, stanza 4, l.51^3.

From the great deep to the great deep he goes.

-Tennyson
  Idylls of the King,'The Coming of Arthur', l.410.