The words are beautiful and somewhat mysterious. If you think deeply about it,Blake is saying that when we look with our spiritual eyes, we see God everywhere. We are able to see the eternal, infinite nature of Divine Life in the simplest objects. Can you see heaven in a wild flower? Can you see heaven in your child's eyes? Can you see heaven in your everyday activities?"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"
In those days the accepted meaning of "heaven" was the afterlife reward for those who lived well according to their religious tradition.
The first definition in dictionary.com is: