This book of the law shall not depart out of your mouth, but you shall meditate thereon day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.
What follows in the second clause of the verse shows, that, everything which profane men endeavor to accomplish in contempt of the word of God, must ultimately fail of success, and that however prosperous the commencement may sometimes seem to be, the issue will be disastrous; because prosperous results can be hoped for only from the divine favor, which is justly withheld from counsels rashly adopted, and from all arrogance of which contempt of God himself is the usual accompaniment. Let believers, therefore, in order that their affairs may turn out as they wish, conciliate the divine blessing alike by diligence in learning and by fidelity in obeying. 