“Moreover the word of the Lord came to Jeremiah a second time, while he was still shut up in the court of the prison, saying, ‘Thus says the Lord who made it, the Lord who formed it to establish it (the Lord is His name): Call to Me, and I will answer you, and show you great and mighty things, which you do not know.” – Jeremiah 33: 1-3
This was the Word of the Lord and a promise to Jeremiah that if Jeremiah would seek Him in prayer, God would reveal things to him. When it says “The Lord is His name”, this is referring to YHVH or Jehovah. This is the proper name of the God of Israel. The God of Israel is the Maker of all things and Sustainer of the world. He is the beginning and the end. And, Jeremiah received a promise from Him.
This was a promise to Jeremiah but I believe it is part of God’s character and a promise to all of His children. When we accept Jesus as Messiah, we are “grafted” in. There is an actual process in which branches can be grafted into trees. It is a horticultural technique where tissues of plants are joined to continue their growth together. The Apostle Paul wrote to the non-Jewish community of believers in Rome about this (see Romans 11).
The “mighty” things being referred to here usually mean “hidden things” or “that which is inaccessible.” These are spiritual things that are beyond the reach of human knowledge. One commentator writes, “The principle adjective basur is used of the strongly fortified cities of Canaan in Deut. 1:28 (walled up); here it refers to matters so far beyond human insight that they require divine revelation.” (Feinberg)
We are grafted in and the promises are to all who accept Jesus as Savior. And as Christ followers, the Lord breaks down walls for us and shows us “great and mighty things” when we seek Him. What amazing things God would show us today if we will only come to Him in humble prayer.
“God’s people don’t learn the hidden things of the Lord by ‘storming the gates’ through their own strength but by seeking Him through believing prayer.” – Unknown