From R' Aviner's blog:
At first, I wanted to get married to a beautiful woman. I was young and I didn't understand life. I didn't understand that grace is false and beauty is vain. I didn't understand that a beautiful woman is no help if she has bad character traits and that she will embitter my life. I learned this lesson the hard way. I met many young women for the purpose of getting married, who were externally pleasant, but did not have a good heart. I finally understood that inner beauty is what is important. Beauty is important – but inner beauty. I then got married to my wife, who is the most beautiful woman in the world in my eyes. Her good character traits give her incredible beauty. And the wonder is that this beauty does not wither with time. On the contrary, it grows. At first, I thought that I would love a woman who is beautiful. It then became clear to me that it is the opposite.
Because I love her, she is beautiful.