"Graze where you will, you shall not house with me. Look to't, think on't; I do not use to jest. Thursday is near; lay hand on heart, advise." Why is this quote significant?

In this quote, Capulet is asserting himself as head of the household. Lord over both family and servants. He makes it very clear that disobeying his wishes is a necessity for anyone to remain a part of the family he heads. In other words..... if you don't like what I have to say..... leave.