John 10:9 (ESV)
“I am the door. If anyone enters by me, he will be saved and will go in and out and find pasture.”
Do not grumble against one another, brothers, so that you may not be judged; behold, the Judge is standing at the door.
“Behold, I stand at the door and knock. If anyone hears my voice and opens the door, I will come in to him, and eat with him. and he with me.”
Mathew 7:7 (NIV)
“Ask and it will be given to you, seek and you will find; knock and the door will be opened to you. For everyone who asks recieves; he who seeks finds; and to him who knocks, the door will be opened.”