Jesus, the founder of Christianity, said:
"...wide is the gate, and broad is the way, that leadeth to destruction [the "second death"], and many there be which go in thereat: because strait is the gate, and narrow is the way, which leadeth unto life [the "second birth"], and few there be that find it." -Matthew 7:13-14

In The Narrow Way, Samael Aun Weor reveals the secret teachings of Jesus that few have known: the "way to life" is within the marvelous "human machine," our physical body.
By harnessing the power of the sexual glands, we can revolt against the current towards destruction.
This revolution cannot be done through belief but through action, through a method known since antiquity but kept secret until now: sexual transmutation, also called alchemy or tantra.
The "way to life" is always sexual, whether creating physical life or spiritual life. That is why throughout the ancient scriptures there are clues towards the preservation of the sexual energy, the "living waters," and why the elite of every religion preserved their sexual energy: they knew how to harness it for purposes higher than mere lust.
The sexual energy is a tremendous power - it creates life! When harnessed and made pure - a process called "white tantra" - it creates life in the superior levels of nature so that one is "born again." The "second birth" is the result of creating the solar bodies (Astral Body, Mental Body, Causal Body), which Jesus called "the wedding garment." With the solar bodies, one is awakened in the superior dimensions of nature.
The Narrow Way exposes the ancient secret path hidden in all religions, and the source of power that gave birth to the most remarkable souls in history, those radiant men and women of terrific compassion and intelligence who embodied the best of what it is to be human. The power to become like them is within you, too.