I can get sleepy during the daytime too, nevermind when it gets dark, but I still don't think I'll have the door shut in my face.
That's a tough parable to interpret coz it implies that Christians can lose their salvation. I don't see how that can happen short of a conscious renunciation of faith.
But that's also another debate, & right now I have my fill of them. Sometimes it's just best to let sleeping dogs lie (pun intended).