A person who is really saved by Grace does not need to be told that he is under solemn obligations to serve Christ. The new life within him tells him that. Instead of regarding it as a burden, he gladly surrenders himself, body, soul, and spirit, to the Lord.
Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom.
