To see a World in a Grain of SandAnd a Heaven in a Wild FlowerHold Infinity in the palm of your handAnd Eternity in an hour (p. 229, Collected Poems of William Blake)
The whole visible world is but an imperceptible speck in the ample bosom of nature. No idea approaches it. We may swell our conceptions beyond all imaginable space, yet bring forth only atoms in comparison with the reality of things. It is an infinite sphere, the centre of which is every where, the circumference no where. It is, in short, the greatest sensible mark of the almighty power of God. (p. 19, Thoughts)