Testing is investigation, exploration, empathy, and communication.
Testing is not checking, automation, breaking software, straightforward, quality assurance, and finite.
A tester is a bug catcher, a teammate, a (user) friend, a guiding light, an inspector, a scout, a thinker, a learner.
Requirements are what your stakeholders require to achieve their goals. Testers clarify and detail those needs.
Testability measures the ability to test. When it's easy, you get deeper and faster info about the product.
This is a personal summary of a chapter from the book Agile Testing: A Practical Guide For Testers And Agile Teams. I'm sure you'll find it useful too.
When we start listening to a problem, at the back of our mind we are already coming up with a solution. And that's a problem.