Question: The following stanza is from Robert Frost's *Into My Own*:

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> One of my wishes is that those dark trees,  
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>  So old and firm they scarcely show the breeze,  
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>  Were not, as ’twere, the merest mask of gloom,  
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>  But stretched away unto the **edge of doom**.
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(Emphasis mine.)

I am guessing that the "edge of doom" is referring to the end of time -- as in, The trees are stretching into the end of time and space. Is this reading correct? Where does the phrase the "edge of doom" come from? At first when I read it, I thought that the "edge of doom" was a dark reference (similar to "mask of gloom"), but it seems to be closer to a wedding vow, such as "Our marriage will last unto the edge of doom".

Answer: 
The author could be alluding to Shakespeare's [*Macbeth* (Act IV, Scene 1, with the witches)](http://www.gutenberg.org/cache/epub/2264/pg2264.html) :

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> A shew of eight Kings, and Banquo last, with a glasse in his hand.
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> Macb. Thou art too like the Spirit of Banquo: Down:
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> Thy Crowne do's seare mine Eye-bals. And thy haire
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> Thou other Gold-bound-brow, is like the first:
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> A third, is like the former. **Filthy Hagges**,
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> Why do you shew me this? - A fourth? Start eyes!
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> **What will the Line stretch out to'th' cracke of Doome?**
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[*Macbeth* (Act IV, Scene 1, emphasis mine)](http://www.gutenberg.org/cache/epub/2264/pg2264.html)

Here, Shakespeare is using the verb *stretch* in a very similar manner, having a character inquire of the witches whether something (in this case, a family dynasty of kings, each succeeding his father, which have appeared in an apparition) will last until doomsday.

The "Filthy Hagges" (i.e. the witches) could be being referenced or alluded to by Frost's gloomy imagery that could be an apt metaphor to describe a stereotypical witch's lair.

Earlier in this scene in Macbeth, we see some tree and forest related imagery, which could map to Frost's use of arboreal language:

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> Thunder 3 Apparation, a **Childe Crowned, with a Tree in his hand**.
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> What is this, that rises like the issue of a King,
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> And weares vpon his Baby-brow, the round
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> And top of Soueraignty?
>  All. Listen, but speake not too't
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> 3 Appar. Be Lyon metled, proud, and take no care:
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> Who chafes, who frets, or where Conspirers are:
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> Macbeth shall neuer vanquish'd be, vntill
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> **Great Byrnam Wood, to high Dunsmane Hill**
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> **Shall come against him.**
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[*Macbeth* (Act IV, Scene 1, emphasis mine)](http://www.gutenberg.org/cache/epub/2264/pg2264.html)
The phrase “the edge of doom” comes from Shakespeare’s [sonnet 116](https://archive.org/details/shakespearesson01shakgoog/page/n108/mode/2up):

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> Loue alters not with his breefe houres and weekes,  
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> But beares it out euen to the edge of doome
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“Doom” means “fate” or “judgement” and here it is being used with the meaning:

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> **Doom, *n.*, 6.** The last or great Judgement at the end of the world
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> *Oxford English Dictionary*
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So that “to the edge of doom” means “until the end of the world”.

In the context of ‘[Into My Own](https://www.bartleby.com/117/1.html)’ the phrase turns the dimension of space (the trees stretching away into the distance) into a metaphor for the passage of time until the end of the world, and the speaker’s journey through the trees into a metaphor for his life and poetic career. And just as the speaker in Shakespeare’s sonnet says that true love never alters, so the speaker in ‘Into My Own’ says that *he* will never alter:

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> They would not find me changed from him they knew—  
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> Only more sure of all I thought was true.
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One way to read this is that the speaker is determined to stick to his own style of writing poetry, regardless of the judgement or “doom” of his critics.