The Glory of Children is their father. Prov 17:6. One of the most important roles of a father is to bless his children with words of blessing on behalf of the heavenly Father. The sense of value and worth for a child is most powerfully seeded from a father.
Like Esau sort the blessing of his father with tears when he had lost it, so many seek the blessing of their father, year after year, hoping for his approval and acceptance.
Nothing can more powerfully convey the love of God than the loving words of a father for his children.