Sahaja samadhi is not broken into intervals, is permanent, and involves no special effort. Its arisal is instantaneous and without progressive stages. It can accompany daily activity without interfering with it. It is a settled calm and complete inner quiet.
There are no distinguishing marks that an outside observer can use to identify a sahaja-conscious man because sahaja represents consciousness itself rather than its transitory states.
Sahaja has been called the lightning flash. Philosophy considers it to be the most desirable goal.
This is illustrated with a classic instance of Indian spirituality involving a king named Janaka. One day he was about to mount his horse and put one foot into the stirrup which hung from the saddle. As he was about to lift himself upwards into the saddle the "lightning flash" struck his consciousness. He was instantly carried away and concentrated so deeply that he failed for some time to lift himself up any higher. From that day onwards he lived in sahaja samadhi which was always present within him.
Those at the state of achieved sahaja are under no compulsion to continue to meditate any more or to practise yoga. They often do--either because of inclinations produced by past habits or as a means of helping other persons. In either case it is experienced as a pleasure. Because this consciousness is permanent, the experiencer does not need to go into meditation. This is despite the outward appearance of a person who places himself in the posture of meditation in order to achieve something.
When you are engaged in outward activity it is not the same as when you are in a trance. This is true for both the beginner and the adept. The adept, however, does not lose the sahaja awareness which he has achieved and can withdraw into the depths of consciousness which the ordinary cannot do.
-- Notebooks Category 25: World-Mind in Individual Mind > Chapter 2: Enlightenment Which Stays > # 138
-- Perspectives > Chapter 25: World-Mind in Individual Mind > # 40