Neither is detrimental, but the mystical kundalini is a bit more raucous.

When you visit the Zen Monasteries, one of the first things required is that you bring a donation. They have to pay for those monasteries. The upkeep is fantastic. The monks have to be fed, and so on.

The world won't necessarily change but your understanding of it will, and therefore the world will change. Your attention will no longer be confined to the physical body and the physical world.

There are people who do, what we would call, lower sorcery. It is best not to be concerned with them. They are not happy people and they can't be a problem if you are aware of what they are doing.

Personal power is a feeling that everybody is looking for called satisfaction. It is different from enlightenment, but you need personal power to become enlightened. Personal power is not the end of the process.

For the person who wants to get to the mystical experience directly, Tantric Buddhism is the path.

I don't think of myself as a guru but as a teacher. If one means 'guru' in the original sense a 'dispeller of darkness' then that certainly is my purpose.