If you do not know how to meditate, look carefully at the nature of that which causes you to be afraid, and you will see the emptiness that has no nature whatsoever ―this is what is called the dharmakaya (the Buddha body of truth).
That emptiness is not a negation; its essence is transcendental awareness, so lucid and dazzling that it is frightful to see ―this is the mind of the sambhogakaya (the Buddha body of delight).
Emptiness and luminosity are not two separate things, but rather the nature of emptiness is luminosity, and the nature of luminosity is emptiness. This indivisible emptiness-luminosity, the naked mind, free of everything, dwells in the uncreated state ―this is the svavabhikakaya (the Buddha body of self-nature).
Its natural energy manifests everywhere without obstruction ―this is the compassionate nirmanakaya (the Buddha body of compassionate kindness).
―Padmasambava Guru Rinpoche, Liberation through Hearing