BLAKE & SCIENCE

The Eternal purpose of Science is stated in the final lines of the Four Zoas:

Four Zoas, Night IX, PAGE 139, (E 407) 
The Sun arises from his dewy bed & the fresh air, 
Play in his smiling beams giving the seeds of life to grow
And the fresh Earth beams forth ten thousand thousand springs of life
Urthona is arisen in his strength no longer now
Divided from Enitharmon no longer the Spectre Los                
Where is the Spectre of Prophecy where the delusive Phantom
Departed & Urthona rises from the ruinous walls
In all his ancient strength to form the golden armour of science
For intellectual War The war of swords departed now
The dark Religions are departed & sweet Science reigns"  

Blake begins the Four Zoas by quoting on Page 3, Ephesians 6:12 in Greek.

Ephesians 6
[10] Finally, my brethren, be strong in the Lord, and in the power of his might.
[11] Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.
[12] For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
[13] Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
[14] Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
[15] And your feet shod with the preparation of the gospel of peace;
[16] Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
[17] And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
[18] Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints

Ackland Art Museum
University of North Carolina
A Breach in a City, the Morning After the Battle

The armour of God which man wears to protect himself from the 'rulers of the darkness of this world' is called by Blake: Science. 

Science is the outer garment formed by the imagination to conduct the intellectual war. 'Nature is a Vision of the Science of the Elohim' (Milton, Plate 29).  The Elohim to Blake can represent the creative aspect of God as in the creation of Adam by the Elohim. So Science gives the material form to images which arise in the imagination. Art and Science are both present in the Eternal world as well as on the Earth, but the Earthly form may be degraded into what may seem to be a parody of  the  Heavenly original.   

Milton, Plate 29 [31], (E 128)
"But Rahab & Tirzah pervert
Their mild influences, therefore the Seven Eyes of God walk round
The Three Heavens of Ulro, where Tirzah & her Sisters            
Weave the black Woof of Death upon Entuthon Benython
In the Vale of Surrey where Horeb terminates in Rephaim
The stamping feet of Zelophehads Daughters are coverd with Human gore
Upon the treddles of the Loom, they sing to the winged shuttle:
The River rises above his banks to wash the Woof:                
He takes it in his arms: be passes it in strength thro his current
The veil of human miseries is woven over the Ocean
From the Atlantic to the Great South Sea, the Erythrean.

Such is the World of Los the labour of six thousand years.
Thus Nature is a Vision of the Science of the Elohim.            

                 End of the First Book."