To a mouse poem. How does the poets comparison of mice and humans in the final 2 stanzas contribute to the poems overall meaning?

In the stanzas containing the famous phrase 'of mice and men' Robert Burns, the poet, compares a rat's ability to live in the present to the human's inability.

Explanation:

Robert Burns is one of the defining figures of Romantic thought. this poem compares the state of bliss that animals live in to the unnatural life a human leads due to their excessive thinking and the woes of modern life.

this is evident in the last 2 stanzas of the poem 'to a mouse' when Burns first calls the mouse 'no thy-lane' and then calls it more fortunate because it can blissfully live in the present while a human is doomed to worry about the future and keep thinking about the past.