Now the mind has become ready for concentration on one object or on one idea. In the sixth stage, a person should concentrate the mind either on one external object or one internal idea upon which to meditate. One finds that, in spite of the best of efforts, the mind does not remain glued to the chosen object. The object appears too hazy and there are breaks in concentration. One has to make repeated attempts during Dharana which ultimately lead to emptying all other thoughts.
Meditation is an unbroken flow of thought towards an external object or an internal idea.
Through intense practice, meditation turns into Samadhi. In Samadhi a person is unconscious of everything about oneself. Even the object of meditation melts away but the vision of the object occupies the entire mind. The knowledge of the object becomes complete. This represents the goal of existence and what all-living beings are moving towards.