Generally, children aren't grateful to their parents for supplying them with their needs, but think it is natural. But when they give birth to children and bring up them, they realize that their parents loved and cared for them in that way and give thanks anew to their parents. Realizing the great love of God who sent Jesus His only Son to give eternal life and heaven to all mankind who were sinners, we cannot but thank God from the heart. In this manner, when we feel God's deep love, we come to obey His words joyfully, give thanks to Him in everything, and give glory to Him in whatever we do.