By Fr. Jerry Pokorsky, Catholic Culture - Natural human love finds its pinnacle expression in marriage. A child is the outward sign of love—a bond of human blood. Marriage is the foundation of families, tribes, and nations. The infusion of God’s grace purifies and uplifts marriage and all human love. The infusion is real, not symbolic... God commands our first parents: “Be fruitful and multiply, and fill the earth and subdue it.” (Gen. 1:28) Husbands and wives fill and subdue the earth, beginning with the love of the marital embrace.