"The life of a family is filled with beautiful moments... But if love is missing, joy is missing, nothing is fun. Jesus always gives us that love: he is its endless source."
Above all, have great respect for the institution of the Sacrament of Matrimony. There cannot be true domestic happiness unless, at the same time, there is fidelity between spouses. Marriage is an institution of natural law, which has been raised by Christ to the dignity of a Sacrament; it is a great gift that God has given to mankind: respect it and honor it.
At the same time, God calls you to respect one another when you fall in love and become engaged, since conjugal life, reserved by divine ordinance to married couples, will bring happiness and peace only to the extent that you are able to build your future hopes upon chastity, both within and outside marriage. I repeat here to all of you that "eros tends to rise . . . towards the Divine, to lead us beyond ourselves; yet for this very reason it calls for a path of ascent, renunciation, purification and healing." (Deus Caritas Est, 5)
To put it briefly, it requires a spirit of sacrifice and renunciation for the sake of a greater good, namely the love of God above all things. Seek to resist forcefully the snares of evil that are found in many contexts, driving you towards a dissolute and paradoxically empty life, causing you to lose the precious gift of your freedom and your true happiness. True love “increasingly seeks the happiness of the other, is concerned more and more with the beloved, bestows itself and wants to ‘be there for’ the other” (ibid., 7) and therefore will always grow in faithfulness, indissolubility and fruitfulness (Pope Emeritus Benedict XVI excerpt from homily given during his trip to Brazil, 2007).
God in His deepest mystery is not a solitude, but a family, since He has in Himself Fatherhood, Sonship, and the essence of the family, which is love.