I pray thee, chide not. Her I love nowDoth grace for grace and love for love allow.The other did not so
Not in a grave,To lay one in, another out to have.
Oh, she knew wellThy love did read by rote, that could not spell. But come, young waverer, come, go with me, 90 In one respect I’ll thy assistant be, For this alliance may so happy proveTo turn your households' rancor to pure love.
Oh, let us hence. I stand on sudden haste.
Wisely and slow. They stumble that run fast.
Romeo is showing how much he loves juliet and how much she loves him back. But soon their love leads to revenge.
This part of the Scene shows revenge because once Romeo and Juliet get married then their families for being do distant and mad at each other. This marriage their families could possibly find peace again.
Frier is saying that if Romeo doesn't handle this slowly then there will a lot of downfalls with his love for juliet.