It is necessary to study the mind itself, mind studying mind. We know that there is the power of the mind called reflective. I am talking to you; at the same time I am standing aside, as it were, a second person, and knowing and hearing that I am talking. You work and think at the same time, another portion of your mind stands by and sees that you are talking. The powers of the mind should be concentrated and turned back upon itself, and as the darkest places reveal their secrets before the penetrating rays of the sun, so will this concentrated mind penetrate its own innermost secrets… It will all be revealed to us.

Vivekananda (1863 – 1902)