S. Foster Damon, on Page 344 of The Blake Dictionary, tells us that: "Blake's religion became really all-inclusive when he decided that 'everything that lives is holy.' This was a natural conclusion from the ancient belief that all things were created from the divine substance."
Blake became convinced that all life partakes of the immortal, infinite, eternal characteristics which are associated with the Divine. The potential within man is to realise his Divine nature. As Paul says in Romans the spirit dwelling within gives us life and sustains us through his love.
 But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.
 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.
Visions of Daughters of Albion, Plate 8, (E 50) "does not that mild beam blot The bat, the owl, the glowing tyger, and the king of night. The sea fowl takes the wintry blast. for a cov'ring to her limbs: And the wild snake, the pestilence to adorn him with gems & gold. And trees. & birds. & beasts. & men. behold their eternal joy. Arise you little glancing wings, and sing your infant joy! Arise and drink your bliss, for every thing that lives is holy! America, Plate 8, (E 54) That pale religious letchery, seeking Virginity, May find it in a harlot, and in coarse-clad honesty The undefil'd tho' ravish'd in her cradle night and morn: For every thing that lives is holy, life delights in life; Because the soul of sweet delight can never be defil'd. Fires inwrap the earthly globe, yet man is not consumd; Amidst the lustful fires he walks: his feet become like brass, His knees and thighs like silver, & his breast and head like gold. Jerusalem, Plate 69, (E 223) "Hence the Infernal Veil grows in the disobedient Female: Which Jesus rends & the whole Druid Law removes away From the Inner Sanctuary: a False Holiness hid within the Center, For the Sanctuary of Eden. is in the Camp: in the Outline, In the Circumference: & every Minute Particular is Holy: Embraces are Cominglings: from the Head even to the Feet; And not a pompous High Priest entering by a Secret Place." Four Zoas, Night II, Page 34, (E 324) "The birds & beasts rejoice & play And every one seeks for his mate to prove his inmost joy Furious & terrible they sport & rend the nether deeps The deep lifts up his rugged head And lost in infinite hum[m]ing wings vanishes with a cry The fading cry is ever dying The living voice is ever living in its inmost joy Arise you little glancing wings & sing your infant joy Arise & drink your bliss For every thing that lives is holy for the source of life Descends to be a weeping babe For the Earthworm renews the moisture of the sandy plain Now my left hand I stretch to earth beneath And strike the terrible string I wake sweet joy in dens of sorrow & I plant a smile In forests of affliction And wake the bubbling springs of life in regions of dark death"
All life is created as a receptacle for spirit. There is a mutually enriching relationship between the receptive body and the inflowing spirit.