Use of contraception from the beginning of a marriage is not in and of itself grounds for finding the marriage to be null. But if from the outset either party has the explicit or implicit intention never to bring children into the world at all, or to deny the other’s right to sexual acts open to procreation, this could make it possible to declare the marriage null and void.
"The [secular] sense of right and wrong is so delicate, so fitful, so easily puzzled, obscured, perverted, so subtle in its argumentative methods, so impressionable by education, so biased by pride and passion, so unsteady in its course, that in the struggle for existence amid the various exercises and triumphs of the human intellect, the sense is at once the highest of all teachers yet the least luminous."
