It is the general Buddhist procedure that one’s own pleasure and pain are acheived by oneself and not from the outside, and that, therefore, sentient beings themselves must understand and implement practices to bring about their own happiness. Thus, the most efficacious way to help others is through teaching what should be adopted in practice and what should be discarded from among current behavior. There is no way to do this unless you come to know all of the topics involved in what should be adopted in practice and what should be discarded—you must become omniscient. As mentioned earlier, there is no way to accomplish this except by removing the obstructions to omniscience, and one who has overcome, utterly and forever, the obstructions to omniscience is a Buddha.
Teachings by His Holiness the Fourteenth Dalai Lama