Literary devices are the visual elements that intensify the mood of the literature and the poem. The phrase uses the paradox as a literary device.
A paradox is a literary device that contains reasonable truth but is self-contradictory, phrase or sentence. Though it seems inaccurate it can be proven valid and accurate.
The phrase cannot be a metaphor as no two things are getting compared, it cannot be a simile because things ate not compared using words 'like and as' also it cannot be a euphemism as it is not a harsh statement.
Therefore, the phrase is an example of a paradox.
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