Does it indirectly reveal any attitudes or emotions?
We can infer some attitudes and emotions from Dickinson's famous poem, the attitudes and emotions of the narrator, which are likely to be those of Dickinson herself, although we know very little of her otherwise, since she led a reclusive and private life, and I do think that most if not all of her poems were not published until after her death. We can see attitudes about life, death, and afterlife, though, just in the text of this poem.
We see that the narrator's attitude toward life was to live it to the fullest, which we can see in the very first lines of the poem:
Because I could not stop for Death –He kindly stopped for me – (1-2)
Since then – 'tis Centuries – and yetFeels shorter than the DayI first surmised the Horses' HeadsWere toward Eternity – (21-24)