How often do young men and women, when choosing their future life partner, not attach importance to his faith: “We love each other and he (she) is not against the fact that I go to church”! However, such a position hides a huge number of dangers for a Christian; At first everything goes well - the couple even get married (at the insistence of the believing party), and it seems that a compromise has been reached. But then everyday life begins, you hear more and more often: “You don’t need anything except the church...”, and finally reality leaves only one choice - the choice between man and God. This brochure is the advice of a missionary priest to Christians who want to get married . It will also be of interest to all those who want to understand how important faith is in the life of every person.