Inquiring into the nature of existance(Inquiry). Meditation. Pranayama. Tantra. etc etc etc.....
There is no ONE path to enlightenment. (and I don't buy the whole "rainbow body" being the only indicator of enlightenment. I see the rainbow body as a potential side effect of enlightenment, and I don't think that everyone who is enlightened displays the rainbow body even if they could. But these are just my thoughts and constitute no fact.)
Love,
Carson[^]