If you feel you have the right key, you try to make some phrase or sound that will fit.
“Reasoning draws a conclusion, but does not make the conclusion certain, unless the mind discovers it by the path of experience.”
“That's been one of my mantras - focus and simplicity. Simple can be harder than complex: You have to work hard to get your thinking clean to make it simple. But it's worth it in the end because once you get there, you can move mountains.”