Act4: During his discussion with Paris in Scene 1, Friar Laurence says in an aside, "I would I knew not why it should be slowed." Whats does Friar mean??

Parris tells the Friar that Juliet's father wants to rush the marriage because she mourns Tybalt's death so greatly. The Frian tells the audience that he wishes he didn't know the actual reason why the marriage should be slowed.