cast pearls before swine

Blanche: ...Physical beauty is passing. A transitory possession. But beauty of the mind and richness of the spirit and tenderness of the heart—and I have all of those things—aren't taken away, but grow! Increase with the years! How strange that I should be called a destitute woman! When I have all of these treasures locked in my heart. [A choked sob comes from her] I think of myself as a very, very rich woman! But I have been foolish—casting my pearls before swine!