It is possible with pure willpower to force the kundalini up the shushumna, through the chakras. You will develop visions of other worlds that will not necessarily stop when you want them to. This is a condition we call insanity.
Frederick LenzTo feel that you are the Buddha of all times and places and that in some way the salvation of anyone, including yourself, depends upon you, I think there's a lot of ego involved in such a view, not much self-transcendence.
Frederick LenzTantra has to do with the reconciliation of opposites. All the yogas recommend that you avoid certain experiences. In tantra there is no avoidance.
Frederick Lenz