Joshua 1: 8
KJV: This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.
NLT: Study this Book of Instruction continually. Meditate on it day and night so you will be sure to obey everything written in it. Only then will you prosper and succeed in all you do.
The definite authoritative sense in the phrase “book of the law” has been weakened into a “book of instruction.” When men open a box of a new gadget, they just switch it on without looking at the instruction manual. Some people think they don’t need instructions but everyone knows they have to obey the law.