Let every one, then, see to it that he esteem this commandment great and high above all things, and do not regard it as a joke. Ask and examine your heart diligently, and you will find whether it cleaves to God alone or not. If you have a heart that can expect of Him nothing but what is good, especially in want and distress, and that, moreover renounces and forsakes everything that is not God, then you have the only true God. If on the contrary, it cleaves to anything else, of which it expects more