This Book of the Law shall not depart from your mouth, but you shall meditate in it day and night, that you may observe to do according to all that is written in it. For then you will make your way prosperous, and then you will have good success. Joshua 1:8
The notion of preparation is one parents teach their children. We need to study for a big test. We need to practice for a recital or performance. We need to practice healthy habits in order to develop our mind and body. Preparation is focused on the future. But how do we prepare spiritually for the future?
When Joshua was preparing to lead the Israelites into the Promised Land, God gave him a principle for preparing for an uncertain future: Meditate, day and night, on the Book of the Law. What was in the Book of the Law? It was a written form of God’s revelation at Sinai to Moses—the first five books of the Old Testament, in full or in part. Those books were passed on to Joshua by Moses before the latter’s death. And God’s instruction was, “Meditate on these books and you’ll have success.” That’s what Deuteronomy 28:1-14 says: Obey the covenant I established with Moses and you will be prosperous.
You have an unknown future. Prepare for it by meditating on God’s Word. He knows your future and can prepare you for it.
Meditate on the Word in the Word. John Owen