If you want to attain liberation, it would be better not to be anxious to practice Dzogchen or Kalachakra, and so on, because there would be no use in practicing these teachings before the foundation is laid. The Buddha once said, “People who want to attain liberation or practice Mahayana Buddhism do not need to study and practice many methods. Only one practice is needed, and that is great compassion.” The Buddha did not mean, however, that great compassion alone can solve every problems, and simply possessing great compassion without practicing other methods won’t work, either.

~ Luminous Wisdom Book Series 9: The Principles of Liberation