In Act 4.6, Katharina tells Petruchio, “Then God be blessed,…

In Act 4.6, Katharina tells Petruchio, “Then God be blessed, it is the blessed sun,/But sun it is not when you say it is not,/ And the moon changes even as your mind./What you will have it named, even that it is,/ And so it shall be still for Katherine “ (IV.vi.19–23).  What does this suggest about Katharina’s degree of submission to her husband?