Answer:
The quote means to fall in love with someone without caring about their looks. If you follow your heart instead of your eyes you can find true love. In the play the some of the characters fall in love based on how the other person looks but when they follow their heart instead falling for who's prettier they find their true love.
Let me know if this helps and good luck!
The sound device that is most evident in line 2 is Alliteration
If there were more men in the world then there would be less kids because women produces children, if there were more women in the world, then there would be less differences.