Attention is the vital thing and there is no tension in attention. It just happens to be a similar word. It's not concentration or straining. Attention has the openness of a young child not yet dominated by the conceptual mind.
Eckhart TolleWhen you listen to a thought, you are aware not only of the thought but also of yourself as the witness of the thought. A new dimension of consciousness has come in.
Eckhart Tolle