Suddenly there came to me 
The music of a mighty sea 
That on a bare and iron shore 
Thundered with a deeper roar 
Than all the tides that leap and run 
With us below the real sun: 
Because the place was far away, 
Above, beyond our homely day, 
Neighbouring close the frozen clime 
Where out of all the woods of time, 
Amid the frightful seraphim 
The fierce, cold eyes of Godhead gleam, 
Revolving hate and misery 
And wars and famines yet to be. 
And in my dreams I stood alone 
Upon a shelf of weedy stone, 
And saw before my shrinking eyes 
The dark, enormous breakers rise, 
And hover and fall with deafening thunder 
Of thwarted foam that echoed under 
The ledge, through many a cavern drear, 
With hollow sounds of wintry fear. 
And through the waters waste and grey, 
Thick-strown for many a league away, 
Out of the toiling sea arose 
Many a face and form of those 
Thin, elemental people dear 
Who live beyond our heavy sphere. 
And all at once from far and near, 
They all held out their arms to me, 
Crying in their melody, 
“Leap in! Leap in and take thy fill 
Of all the cosmic good and ill, 
Be as the Living ones that know 
Enormous joy, enormous woe, 
Pain beyond thought and fiery bliss: 
For all thy study hunted this, 
On wings of magic to arise, 
And wash from off thy filmed eyes 
The cloud of cold mortality, 
To find the real life and be 
As are the children of the deep! 
Be bold and dare the glorious leap, 
Or to thy shame, go, slink again 
Back to the narrow ways of men.” 
So all these mocked me as I stood 
Striving to wake because I feared the flood.
Clive Staples Lewis
http://www.poemhunter.com/poem/l-apprenti-sorcier/