" To practice tantra requires even greater compassion and greater intelligence than are required on the sutra path; thus, though many persons in the degenerate era are interested in tantra, tantra is not for degenerate persons. Tantra is limited to persons whose compassion is so great that they cannot bear to spend unnecessary time in attaining Buddhahood, as they want to be a supreme source of help and happiness for others quickly. "

― Jeffrey Hopkins , Meditation on Emptiness