Step down a step to marry a wife

“Step down a step to marry a wife (Yevomos 63a) as follows: “It means it’s advisable that your wife should always look up to you.” That’s why Hakodosh Boruch Hu made women shorter than men, that’s the truth. Now, in order that your wife should look up to you, you have to be superior to your wife. Suppose your wife comes from a big, aristocratic family, and you're from a family of nobodies, it’s going to haunt you all your life; she might bring it up too. Therefore it’s better to marry somebody who is less aristocratic.”

Thursday Nights with Rabbi Miller, Vol. 2, p. 336, tape #491.