Ask the child why it is born; ask the flower why it blossoms; ask the sun why it shines. I love you because I must love you. 
- George Upton

Two human loves makes one divine.
-Elizabeth Barrett Browning

One should believe in marriage as in the immortality of the soul. 
-Honore de Balzac

We come to love not by finding the perfect person, but by learning to see an imperfect person perfectly.
-Sam Keen

Love one another
But make not a bond of love.
Let it rather be a moving sea
Between the shores of your souls.
- Kahlil Gibran