If thou would'st know the mystic song 



Chaunted when the sphere was young, 



Aloft, abroad, the paean swells, 



O wise man, hear'st thou half it tells ? 



To the open ear it sings 



The earlv^ genesis of things ; 



Of tendency through endless ages 



Of star-dust and star-pilgrimages, 



Of rounded worlds, of space and time, 



Of the old floods' subsiding slime, 



Of chemic matter, force and form, 



Of poles and powers, cold, wet, and warm. 



The rushing metamorphosis 



Dissolving all that fixture is, 



Melts things that be to things that seem, 



And solid nature to a dream.' 



EMERSON. 



Was war' ein Gott der nur von aussen stiesse, 

 Im Kreis das All am Finger laufen liesse 

 Jhm ziemt's, die Welt im Innern zu bewegen, 

 Natur in Sich, Sich in Natur zu hegen.' 



GOETHE. 



VIII. 

 SCIENTIFIC USE OF THE IMAGINATION. 1 



* Lastly, physical investigation, more than anything besides* helps to 

 teach us the actual value and right use of the Imagination of that 

 wondrous faculty, which, left to ramble uncontrolled, leads us astray 

 into a wilderness of perplexities and errors, a land of mists and 

 shadoivs ; but which, properly controlled by experience and reflection, 

 becomes the noblest attribute of man; the source of poetic genius, the 



1 Discourse delivered before the British Association at Liverpool, 

 September 16, 1870. 



