i dont agree with the benefits mentioned above.......
i mean........brothers dont keep beard to gain more respect....neither they want more friends just by keeping the beard .......

Its basically......following the sunnah.......right.
Its just like , when you love somebody, intentionally as well as unintentionally.........you try to be like your beloved. You take care of what he likes and dislikes.
So as the love of our beloved Prophet (peace be upon him) grows stronger in our hearts.......we are more likely to go for what he did. i.e.following his teachings.

I hope i sound clear....

anyways.......the rest of the poem was nice