Analysis of Hidden Harmony

THE thoughts in me are very calm and high
That think upon your love: yet by your leave
You shall not greatly marvel that this eve
Or nightfall—yet scarce nightfall—the strong sky
Leaves me thus sad. Now if you ask me why,
I cannot teach you, dear; but I believe
It is that man will always interweave
Life with fresh want, with wish or fear to die.
It may be therefore,—though the matter touch
Nowise our love,—that I so often look
Sad in your presence, often feeling so.
And of the reason I can tell thus much:—
Man's soul is like the music in a book
Which were not music but for high and low.