The speaker says they go hunting not out of a wish to kill but "from an urge to see." Hunting here seems to be a way of paying close attention. The second half of the poem adds a twist: the speaker would never just lie in a field doing nothing, because that kind of idleness risks missing "the truth of the place." Quiet, in this view, is a disguise. A still field looks peaceful and simple, but its real nature is hidden behind that calm surface.
The mood is thoughtful and restless, with a hint of tension. The speaker feels that stillness can be deceptive, and that you have to move, search and stay alert to understand a landscape. The broken, hesitant lines, with the sentence spilling across stanza breaks ("almost / to miss"), mimic a mind working something out as it goes. The poem is quiet itself, but it argues that real seeing takes effort.