This book of the law shall not depart out of your mouth; but you shall meditate therein 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. Have not I commanded you? Be strong and of a good courage; be not afraid, neither be you dismayed: for the LORD your God is with you wherever you go. (Joshua 1:8-9)