What is Meaning of phrase foolish tear in poem woodman spare that tree?

In the poem "Woodman, Spare That Tree," the phrase "foolish tear" is used to describe a tear shed by the speaker for a tree that is about to be cut down. The speaker uses this phrase to express his strong emotional attachment to the tree and his belief that it is worth preserving. The "foolish" part of the tear refers to the fact that it is unlikely that the tree will actually be spared because of the speaker's tears, but the tear still represents the speaker's deep sorrow and regret at the loss of the tree.