1 Mercutio: How are you coping after breaking up with your fiancé?
2 Ophelia: It was upsetting of course, but I think it's for the best.
3 Ophelia: You know what they say. When one door closes, another one opens.
4 Shakespeare: Morning Ophelia, Mercutio.
4 Ophelia: I just have to figure out where that new door is.

When one door closes another door opens; but we so 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, who secured patent rights on the invention of the telephone. (Who actually invented it is the subject of a considerable amount of dispute.) He also said, with impressive prescience:

One day every major city in America will have a telephone.

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2022-05-29 Rerun commentary: Sometimes the other door that opens is a secret door, detectable only by a Difficulty Class 18 Wisdom (Perception) check. And it's trapped, with a trap that requires a DC 20 Wisdom (Perception) check to detect and a DC 25 Dexterity check using thieves' tools to disarm it.