Related:

• Teachers open the door, but you must enter by yourself. -- Chinese Proverb
• The door is already open!
• The door is extremely rusty and refuses to open.
• Homer himself must beg if he want means, and as by report sometimes he did "go from door to door and sing ballads, with a company of boys about him.
  -- Robert Burton (1577-1640) -- The Anatomy of Melancholy, Part i, Sect. 2, Memb. 4, Subsect. 6...
• Misfortunes always enter a door left open for them.
• When fortune knocks, be sure to open the door. BAILEY
• Smithers: Come on Simpson, open up! We know you're in there.
  [The goons break the door open.] [looking under stalls] Mmm....
• On the other size of the door is a narrow passage which opens out into a larger area.
• Why look thru Windows? Open the door to the future: OS/2