Comment by renewiltord

For me this has happened with business advice. I was a teenager when people told me variants of:

* Validate quickly

* Know your customer

and eventually that became

* Fail fast

* Test your idea

And I didn't even realize what it _meant_. I didn't grok it. The first time I encountered the concept of a Painted Door in product design in practice I suddenly understood pieces of these. And the first time I failed to really understand the customer, and failed to fail fast, and so on, I understood those things. But I had to experience it to know it.

It did help to have the vocabulary so I could spot where I failed, though.