Love

True love doesn't age, but is timeless. It dies and is reborn several times over the course of a marriage, but it is without end. It cannot be bought or paid for, will never go out of fashion, and it is continually self sacrificing. It is possibly the closest we will ever come in this life to fully emulating Christ, each day dying a little bit more for the other and to ourselves, and in the end overcoming a small bit of the world. It may just last forever.