These are the significance of Frost's usage of paradox. In the closing couplet, the speaker offers two logical explanations to the question of how the coincidence of the three white creatures came to be. The first possibility is that there is a force of evil at work that has created a "design of darkness to appall."(Line 13) Satan perhaps, orchestrated a scene of destruction in the color of innocence and purity. The second is that there is no order in the universe at all, or at least none that operates on such a minor scale. The "design of darkness" could only exist if "design governs in a thing so small."(Line 14) Since God is said to be governance of all things great and small, the possibility that design doesn't govern in miniscule matter immediately raises the issues that maybe there is no God to order the will of nature at all. These are the evidence of Frost's usage of ambiguity.
In the poem "Fire and Ice," Frost compares and contrasts the two destructive forces: fire and ice. In the first two lines of the poem he presents two options for the end of the world: an end by fire or an end by ice. Frost depicts, "From what I've tasted of desire, I hold with those who favor fire."(Line 3-4) It is paradox because at first he takes the position of fire which may represent desire. However, in the next stanza Frost makes the case for the destructive force of ice which relates to hate. "I think I know enough of hate to say that for destruction ice, is also great."(Line 6-8) These few verses demonstrate that he can't make a stand for his own belief and keeps jumping from one side to another. This poem is also ambiguous because Frost wants to express not only the meaning from the appearance of the poem, which states that fire and ice can destroy the world, but also the guilt of the human sins. The poem provides readers with a view of hate as something that causes people to become rigid, unmoving and cold.