Distrustful of the Gentian—
And just to turn away,
The fluttering of her fringes
Chid my perfidy—
Weary for my—————
I will singing go—
I shall not feel the sleet—then—
I shall not fear the snow.
- F 26 (1858)
The blank spot in line five takes the place of a name, probably her dear friend and sister-in-law Sue Dickinson whom Emily Dickinson called Suzie. "Suzie" makes a nice starting point for the alliterations in the following three lines: singing, sleet, and snow. I've read here and there that Emily was an exhausting friend, and that Sue sometimes needed space.
If we take all of the above into account, we read the poem as an account of friendship on one level and then of acceptance on a larger scale or deeper level. Thinking of the Gentian as her friend Sue, we are introduced immediately to the idea that Dickinson doesn't completely trust her and has turned away. The fluttering fringes evoke the teasing batting of eyelashes--Sue isn't angry, she chides Emily with a mild look for her seeming change of heart. But then Emily wearies of staying apart from her friend and decides to go back with a song in her heart. She'll need the song because she takes it for a given that there will be sleet and there will be snow. That doesn't sound like complete trust to me, but a learned reverend once told me that faith is acting as if you believe something is true even if you don't. So Emily wants to resume the friendship and knows she needs to present a song rather than distrust.
Read another way, the poem is a siren song with the last fall flowers, the Gentian, beckoning to the forest wanderer to stay and linger in the autumnal woods. The fluttering fringed gentian seems to chide the wanderer's abandonment. Winter is close by and the cold weather will harm not only the delicate flower but the human who remains by its side. Then comes the numbing cold. We see this numbing cold, famously, in her poem "After great pain a formal feeling comes," which ends:
It is truly an act of faith to stay with the beckoning flower, or perhaps Dickinson is not unwilling to contemplate 'the letting go'. Extrapolating further, we read into the poem that at some point, one must be willing to commit to a small hope or object of desire, no matter the snow.