A poem…begins as a lump in the throat, a sense of wrong, a homesickness, a lovesickness. It is a reaching-out toward expression; an effort to find fulfillment. A complete poem is one where an emotion finds the thought and the thought finds the words.
Letter to Louis Untermeyer (1 January 1916).
and then
Talking is a hydrant in the yard and writing is a faucet upstairs in the house. Opening the first takes all the pressure off the second. My mouth is sealed for the duration of my stay here. I’m not even going to write letters around to explain to collectors my not having had any Christmas card this year. I’m not going to explain anything personal any more.
Letter to Sydney Cox (3 January 1937), quoted in Robert Frost : The Trial By Existence (1960) by Elizabeth Shepley Sergeant, p. 351, and Robert Frost and Sidney Cox: Forty Years of Friendship (1981) by William Richard Evans, p. 223.
and then, the end of The Sound of Trees
I shall set forth for somewhere,
I shall make the reckless choice
Some day when they are in voice
And tossing so as to scare
The white clouds over them on.
I shall have less to say,
But I shall be gone.
“The Sound of Trees” (1920)