From Leo Tolstoy
To his fiance, Valeria Arsenev
I already love in you your beauty, but I am only beginning to love in you that which is eternal and ever precious: your heart, your soul.
Beauty one could get to know and fall in love with in one hour and cease to love it as speedily. But the soul, one must learn to know. Believe me, nothing on earth is given without labor--even love, the most beautiful adn natural of feelings.
Letter via Love Letters of Great Men