There are two ways in which concentration is practised. The first is unconscious and is used by many persons to get their work done whether they be engineers or artists. They have to hold their mind to the job, the matter, or the duty in hand. The scientist may practise it, too, in analysing or in logically developing a theory or in linking up different ideas. The meditator uses concentration in a different way if he is at the first stage, which is the conscious and deliberate practice of concentration. It is then used without analysis, without discursive thought. It is simply held to a single object or idea. The attention is not allowed to wander away into developments of that idea or object. In short, the connections to other things are not made.
-- Notebooks Category 4: Elementary Meditation > Chapter 3 : Fundamentals > # 120
