Catechism of the Catholic Church

Through the grace of the sacrament of marriage, parents receive the responsibility and privilege of evangelizing their children. Parents should initiate their children at an early age into the mysteries of the faith of which they are the "first heralds" for their children. They should associate them from their tenderest years with the life of the Church. A wholesome family life can foster interior dispositions that are a genuine preparation for a living faith and remain a support for it throughout one's life. (1656)