Related:

• At the narrow passage there is no brother and no friend. Arab Proverb
• You are in a narrow twisty passage with many visible paths away.
• The hand that turneth the knob, opens the door.
• A secret in his mouth, Is like a wild bird put into a cage
  Whose door no sooner opens, but 'tis out. -- Johnso...
• When one door closes another door opens; but we often look so long and so regretfully upon the closed door, that we do not see the ones which open for us.
  -- Alexander Graham Bell...
• When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.
  -- Helen Kelle...
• A trap door opens up under you!
• If God shuts one door, he opens another.
• That segment of the community with which one has the greatest sympathy as a liberal, inevitably turns out to be one of the most narrow-minded and bigoted segments of the community.