If you need a wedding reading about love, look no further than this reading by Thomas a Kempis:
Love is a great thing, yea, a great and thorough good. By itself it makes that is heavy light; and it bears evenly all that is uneven.
It carries a burden which is no burden; it will not be kept back by anything low and mean; it desires to be free from all wordly affections, and not to be entangled by any outward prosperity, or by any adversity subdued.
Love feels no burden, thinks nothing of trouble, attempts what is above its strength, pleads no excuse of impossibility. It is therefore able to undertake all things, and it completes many things, and warrants them to take effect, where he who does not love would faint and lie down.
Though weary, it is not tired; though pressed it is not straitened; though alarmed, it is not confounded; but as a living flame it forces itself upwards and securely passes through all.
Love is active and sincere, courageous, patient, faithful, prudent and manly.