This poem concerns the way that a long anticipated fear is actually made less fearsome because of the way that we have been waiting for it for so long and this has almost made it "fair" instead of a "fear." What is key in Dickinson's style is the way that she uses simple words to convey complex ideas and feelings, and we can see this stylistic element very definitely in this poem. Note for example the way that this poem ends with a metaphor to help cement her point:
The Trying on the Utmost
The Morning it is new
Is Terribler than wearing it
A whole existence through.
Dickinson uses a metaphor of wearing clothes that is clearly one that every reader can relate to in order to present the difference between a sudden fear that must be "tried on" that very day and then "wearing" a fear for all of your life. Dickinson, through employing such images that relate to every day existence, clearly presents us with an image of fear that helps to demystify it and almost presents it as a friend.