Definitions for "Thinking"
Having the faculty of thought; cogitative; capable of a regular train of ideas; as, man is a thinking being.
The act of thinking; mode of thinking; imagination; cogitation; judgment.
the mental manipulation of words and images, as in concept formation, problem solving, and decision making. (310)
as used here, thinking refers to low-amplitude verbal operant action, generally subvocal speaking; an "inner" response or chain of responses.
Keywords:  frown, paused, carefully, thought, him
the process of thinking (especially thinking carefully); "thinking always made him frown"; "she paused for thought"
Keywords:  focus, sustained, choose, regard, want
is the process we use to give form and shape to substance. Each of us has free will to choose what we think and where to focus our power to shape substance. If we want to change our lives, we must change our thinking.
sustained focus with regard to a specific issue or problem
A purposeful, organized cognitive process used to understand the world and make informed decisions.