When the children of Israel were about to cross the Jordan, the Lord spoke to Joshua to tell the people to prepare themselves, because it was going to be a great miracle; it was going to be a different kind from what they had known in the days of Moses. Moses had to stretch forth his hand over the waters of the Red Sea, and God sent a strong wind to split the sea wide open.
But when Joshua got to the River Jordan, he didn't have to stretch his hands over the waters or reach for the rod of Moses. He sent the Priests ahead of him and all they did was to step into the water, and the Jordan opened up for the people to walk through on dry ground. It was a new day! Nevertheless, God told them to prepare.
Always, God wants us prepared. He even said, in judgment, "prepare to meet thy God" (Amos 4:12). In everything, He wants you to prepare. He doesn't just take us by surprise.
Before you attend any service in Church, for example, it's important that you prepare your heart for what the Lord is going to bless you with. Our opening verse says, "Circumcise therefore the foreskin of your heart." He's telling you to cultivate and condition your spirit; break up the fallow grounds; prepare your heart for the change, the glory, which the Lord is bringing to you. Prepare for the Word that's coming to you. His Word is the only material that can catapult a man from one level of glory to another. His Word is life!
For every opportunity you have to receive the Word of God, you must prepare your heart and let the message that comes to you affect your life. Receive the Word joyfully and wholeheartedly, and you'll be amazed how it'll produce result in your life. If you're the one to share God's Word with others, prayerfully and meditatively prepare your message.