When God Closes a Door...

All my life I've heard comments to the effect that "when God closes a door He opens another" (or a window, etc.). It's one of those axioms that seems to just be accepted among those of faith. But recently, when I heard one such statement made I had a thought, (whether divinely inspired or not I cannot claim), but perhaps an epiphany none the less...
When I heard the statement I had the mental image of a hallway with a door closing on a person. But that door,  like most doors, had a doorknob, and I thought, "Just because the door closes doesn't mean it can't be re-opened". Doors are meant to be closed and opened. Sometimes it just takes a little effort on our part. Sometimes it just takes an act of faith to reach out and turn that doorknob, to reopen the door, and to go through. Perhaps the door closed to test our faith, to see if we will be proactive and make an effort, or do we just sit back and say, "Lord, give me another path. Open another door."
I think that the Lord does indeed give us direction, but He also expects us to be proactive. When Peter was in chains, in prison, the Angel of the Lord freed him of his chains. Peter didn't just sit back and say, "Woe is me!", and sit there. He got up and left. (Acts 12) When Paul and Silas were imprisoned they didn't just sit there; they used their situation to their advantage to free themselves (Acts 16). There are many recorded instances of doors seemingly closed, then reopen by proactive actions. All too often I think we as Christians today sit back and expect God to act miraculously on our behalf, but we aren't willing to act. I do believe God expects us to be proactive, not passive. God is a proactive God, not a passive one- He's a God of action. He expects us to be people of action too. I've also heard that "God helps those who help themselves".
Food for thought...