Indissolubility means that the marriage union is permanent. It is not going anywhere, no divorce, separation; this is the real deal. What God has brought together let no man separate. The vocation of the religious life, Holy Orders, and lay consecrated also must be permanent in that the person remains in that vocation and the vocation helps them torwards heaven. The vows of chastity, poverty, and obedience are a pledge of there permanence.
Faithfulness means that the marriage union exclusive. The husband gives the gift of himself completely to his wife solely. The wife gives the gift of herself completely to her husband solely. The same is true of the vocation of the religious life, Holy Orders, and lay consecratedwho give themselves exclusively to God through their community and the Church. Exclusive means only one, they do not give themselves to more than one.
Open to fertility means that the marriage union is procreative. The husband and wife, created in the image of God, join with God in the creation of new life. The couple must always be open to the creation of life and the nurturing of the life. The religious life, Holy Orders and lay consecrate are definitely procreative. Although they do not procreate physically, they must beprocreative through nurtuing and supporting the spiritual life os all souls.
When it comes to vocations, three pillars are necessary: Permanence, Exclusivity and Procreation. The school of the gift of self teaches you the value all three for your vocation.
