Wounldn't it be nice if all the "doors" in life were as obvious as this. There's no doubt that as we navigate our lives that doors will open and close as we go along. Whether it's a decision around schooling, a job, a new home or a marriage (to name just a few), they'll be ample opportuntiy for us to "try" various doors. Some will open and we'll pass through, while others will remain closed (regardless of how much we wanted it to fling open) and some may even open but then later close.
Do you trust when a door doesn't open that it is God's will? Or, do you run out to the garage seeking the sledgehammer to start "banging" away on it. The prior exhibits faith. The latter says you think you know what's best, and gosh darn it, I "want" to go through that door, so I'm going (regardless of what God thinks)!
That's what the above picture is about. If ALL those things were going on at a door we were going to try, no matter how BADLY we wanted it to open, we'd probably say "nah, guess this one isn't meant to be". Unfortuantely, that's not how God works. He's not going to make it THAT obvious because He respects our freedom to choose. He'll provide the door, but then will want to see how we handle it from there. Will we prayerfully consult Him about it or will we try to push through it on our own if it doesn't open? God doesn't want mindless slaves, but rather obedient servants who TRUST Him in all aspects of their lives.
How have you handled your doors in life so far? Maybe God has you in front of one "right now". Remember this above all things, God loves you and is not out to harm you, but rather desires to provide you with hope and a future (Jeremiah 29:11). So, how are you going to proceed when you encounter your next door? Why not "ask" Him what you should do, because all He wants to do is help.