Many occultist students want internal illumination and suffer horribly because in spite of many years of study and esoteric practices, they remain as blind and unconscious as when they first began to read the first books.  We, the Brethren of the Temple, know through our own experience that the cardiac chakra is definitive for internal illumination.  The Shiva Samhita, a great Hindustani book, speaks at great length about the benefits obtained by the yogi on meditating on the chakra of the tranquil heart: “The yogi acquires immense knowledge, knows the past, the present and the future; he has clairaudience and clairvoyance and can go through the air wherever he pleases.  He sees the adepts and the yogini Goddesses; he obtains the faculty called Kheckari (to move through the air) and bhuchari (to go at will to all corners of the world).”

Those who want to learn how to leave in the Astral Body at will, those who want to enter into the Jinn science, to learn how to place themselves within the Fourth Dimension with the physical body and travel with their physical body to any distant place in the world without the necessity of an airplane; those who urgently need to awaken their clairvoyance and clairaudience must concentrate their mind daily on the cardiac chakra and meditate profoundly on that marvelous center.  To meditate on this center for one hour daily is marvelous.  The mantra of this chakra is the vowel O, which is vocalized by prolonging the sound like this:

OOOOOOOOOOOOOOOO

During the former indicated practice, one must pray to Christ, asking him to awaken the heart chakra.

Excerpted from The Perfect Matrimony (1950) by Samael Aun Weor.