When the script says "the door will be opened," I was not sure what it means exactly. I thought it is only a metaphor of welcoming and inviting. Imagine the famous picture of Jesus is standing in front of the door and waiting for us. But now I see it little differently, and I think this "door" is Jesus Christ, our Savior, Himself. Like the ark that saved Noah's family had ONE door, Jesus Christ is the ONLY "way" that saved my life and redeemed my debt. I can build a relationship with God as his child ONLY through Christ. I can pray a prayer in Jesus' name, so the prayer can be delivered to God after won all the spiritual battles.
Because God loved me first, I can love Him. Because of His faithfulness, I live in faith on His promises. The truth is there, ready to be answered; the plans for my life is already built—before even I was born; Jesus Christ died for my sin—and rose from death. So only do I is ask, seek and knock.