“If you shut your door to all errors truth will be shut out.”Rabindranath Tagore · Păsări răzlețe · 1916 · 130
Error and truth enter through the same door: seal it and you lose both.
The line describes a geometry of knowledge: error and truth enter through the same door, the door of trial. Seal it to become immune to mistakes and you lose truth as well, because you cannot tell in advance which idea is the right one. A lab that rejects every bold hypothesis makes no discoveries; a person who never risks being wrong learns nothing new about the world or about themselves.
Tagore doesn't just say mistakes are a price paid for truth. He says something subtler: the two cannot be separated in advance, because they look the same before the test. A good idea and a bad one look identical on paper. Only the attempt tells them apart. So error isn't merely a cost; it is information. It shows you where truth isn't, and by elimination, where it might be. Think of someone searching for a lost key: they try several locks, and the ones that don't open aren't waste, they're a map. The next question: if error is information, how do we read it without being defined by it?
Why it matters It is an antidote to the culture of fear around mistakes, to meetings where nobody proposes anything lest they be blamed if it fails.