XV. The apostle certainly, after assigning the planting and watering to art and earth and water, conceded the growth to God alone, where he says, “Neither is he that planteth anything, neither he that watereth; but God that giveth the increase.” For he knew that Wisdom, the first-born of God, the parent and artificer of all things, brings forth everything into the world; whom the ancients called Nature and Providence, because she, with constant provision and care, gives to all things birth and growth. “For,” says the Wisdom of God, “my Father worketh hitherto, and I work.” Now it is on this account that Solomon called Wisdom the artificer of all things, since God is in no respect poor, but able richly to create, and make, and vary, and increase all things.