Mock on Mock on Voltaire Rousseau
Mock on Mock on tis all in vain
You throw the sand against the wind
And the wind blows it back again

And every sand becomes a Gem
Reflected in the beams divine
Blown back they blind the mocking Eye
But still in Israels paths they shine

The Atoms of Democritus
And Newtons Particles of light
Are sands upon the Red sea shore
Where Israels tents do shine so bright

—

William Blake (1757-1827)

William Blake, The Complete Poems; Penguin Books, Harmondsworth; ISBN 0140422153
William Blake, The Complete Illuminated Books; Thames & Hudson, London; ISBN 0500282455
Morris Eaves (ed.), The Cambridge Companion to William Blake; Cambridge University Press, Cambridge; ISBN 0521781477 (hardcover) 0521786770 (paperback)