More than 2,500 years ago, a man decided to find out why there is suffering, and how to overcome it. He succeeded, and became known as "The Buddha," which means, "One who is awake." Since then, there have emerged many variations and interpretations of what he taught, with some believing that his teachings were something he invented or created on his own. Contrary to this belief, he said,

"I have seen an ancient path, an ancient road traversed by the rightly enlightened ones of former times. And what is that ancient path, that ancient road? It is just this noble eight-fold path." - Buddha Shakyamuni, Samyutta Nikaya ii.106

Therefore, his knowledge — what in Greek is called Gnosis — existed before he did, and he only taught what he understood of that ancient knowledge.

Accomplishing Dream Yoga
Bhavachakra, the Wheel of Becoming
Bodhisattva's Jewel Garland
Bodhisattva's Song
Buddha: Sex and the Middle Path
Candamaharosana tantra: Worship Woman
Cosmic Teachings of a Lama
Create a Dream Body
Dalai Lama: Innate Joy
Dalai Lama: Karmamudra
Dalai Lama: Relying on a Partner
Dalai Lama: Sex and Kalachakra
Dalai Lama: Teachings about Sex
Dalai Lamas: Sexual Yoga
Dombipa: The Tiger-Rider
Eight Verses on Mind Training
Fuel for Spiritual Experience
Gnosis of Buddha Dharma
Gnostic Life of the Buddha
Illusory Nature
Kalachakra: Bliss
Kalachakra: Bodhichitta
Longchenpa: Masturbation
Marpa: Sexual Transmutation
Meditating on Dream Illusions
Milarepa Interprets a Dream
Milarepa: Karmamudra
Milarepa: Sexual Energy
Naropa: Dream Yoga
Naropa: Inner Heat Yoga
Naropa: Karmamudra Yoga
Naropa: Vajra Verses
Naropa: Yoga of Psychic Heat
Padmasambhava: Closing Wombs
Padmasambhava: Instructions on Dreaming
Padmasambhava: Sleep and Dreams
Panchen Lama: Karmamudra
Path of the Bodhisattva
Patimokkha: Sexual Offenses
Prayer to Maitreya
Root Verses of the Six Betweens
Seven Minds and Seven Truths
The Foundation of Dream Yoga
The Heart of Wisdom Sutra
The Mystery of the Golden Blossom
The Nature of True Realization
Thirty-seven Verses on the Practices of Bodhisattvas
Three Principal Paths
Tilopa the Sesame-watcher
Tilopa: Karmamudra
Tsongkhapa: Retention
Tsongkhapa: Vital Energies
Vashishtha and Buddha
Vimalaprabha: White Fluid
Yeshe Tsogyal: Advice about Sex
Yeshe Tsogyal: Sex and Initiation