Sweet stream that winds through yonder glade,  
Apt emblem of a virtuous maid  
Silent and chaste she steals along,  
Far from the world's gay busy throng:  
With gentle yet prevailing force,  
Intent upon her destined course;  
Graceful and useful all she does,  
Blessing and blest where'er she goes;  
Pure-bosom'd as that watery glass,  
And Heaven reflected in her face.
William Cowper
http://www.poemhunter.com/poem/a-comparison-addressed-to-a-young-lady/