The brain is wider than the sky - Emily Dickinson

This is a metaphysical poem by Emily Dickinson ... she starts saying that the brain is wider than the sky.  I would have used the word "mind" instead of brain to equate it to the eastern "man." She is basically saying that the mind has this immense capacity. It is larger than the sky because you can put the sky in your mind and it still has space for yourself. It is also larger than the sea as it can absorb the sea like sponges and buckets can absorb water. The mind can only be equated to God. What is the difference between the two ... just like the syllable and sound!

This reminds me of Bhagat Ravidas's poem, Tohi Mohi

You are me, and I am You; what is the difference?
Like gold and bracelet, or ocean and wave. 
- Bhagat Ravidas

Sea - Wikipedia

The Poem

The brain is wider than the sky,
For, put them side by side,
The one the other will include
With ease, and you beside.

The brain is deeper than the sea,
For, hold them, blue to blue,
The one the other will absorb,
As sponges, buckets do.

The brain is just the weight of God,
For, lift them, pound for pound,
And they will differ, if they do,
As syllable from sound.