In Genesis 1, God speaks and it comes to be. "Let there be Light...and it was so." While not the same word in Hebrew, we say something similar at the end of our prayers: "Amen" or "So be it/Let is be so." Mary, the mother of our Lord, says something similar, "May it be to me as You have said."
We follow God, we image Him, when we take His Amen, which is His Word, His Son, His will, and direct it back to Him. It is as He has said, so may it be as we have said. "Your kingdom come, your will be done, on earth as it is in heaven."
God's Word, then, by which He made the world, is Amen -- no wonder Jesus describes Himself in the book of Revelation as the "Amen of God." All the world was created in this Amen, who has taken on the creation into Himself, so that it might be all gathered up into Himself, as St. Paul tells us in Ephesians. The world, then, is a dialogue: the Word makes it so, and with great thankfulness, the Word enfleshed -- as Christ and as His Church -- responds with Amen, may it be unto us as You have said.