There is nothing pure in our lives until we have made a complete surrender of ourselves to the word of the Lord. We are well fortified against the stratagems of Satan when God's law is deeply seated in our hearts. For unless it has a fast and firm hold there, we will readily fall into sin. Our true safeguard, then, lies not in a slender knowledge of his law, or in a careless perusal of it, but in hiding it deeply in our hearts. -- John Calvin