There is no excerpt provided but Montague is concerned that Romeo is falling in loving too quickly.
Explanation:
In simple words, Romeo had a relationship recently with Rosaline who wanted to remain unmarried. As a result, Romeo, of course, was heart broken and he meets Juliet the same night at the party and is immediately in love. Montague is concerned that Romeo is too quickly falling in love and this is very clear since they get married after a few days of knowing each other.
King is hopeful that his readers will agree with the need for brotherhood and equality among people because we are all the human race and if this is the letter from berginham jail because they are all clergymen
