Passage from "Passage"

From Section 13 of Whitman's great poem, "Passage to India": 

Passage to more than India!   
O secret of the earth and sky! 
Of you, O waters of the sea! O winding creeks and rivers!   
Of you, O woods and fields! Of you, strong mountains of my land!   
Of you, O prairies! Of you, gray rocks!   
O morning red! O clouds! O rain and snows!   
O day and night, passage to you!
   
O sun and moon, and all you stars! Sirius and Jupiter!   
Passage to you!   

Passage—immediate passage! the blood burns in my veins!   
Away, O soul! hoist instantly the anchor!   
Cut the hawsers—haul out—shake out every sail! 
Have we not stood here like trees in the ground long enough?   
Have we not grovell’d here long enough, eating and drinking like mere brutes?   
Have we not darken’d and dazed ourselves with books long enough?   
   
Sail forth! steer for the deep waters only!   
Reckless, O soul, exploring, I with thee, and thou with me; 
For we are bound where mariner has not yet dared to go,   
And we will risk the ship, ourselves and all.   
   
O my brave soul!   
O farther, farther sail!   
O daring joy, but safe! Are they not all the seas of God? 
O farther, farther, farther sail!