Unless we practice the teachings through study, reflection, and meditation, we are stuck in the rut of being controlled by our thoughts and habits. The way we think of and perceive the world is mistaken. Our consciousness is structured such that no matter how carefully we may think, no matter how hard we may try to grasp the world around us, the conclusion we arrive at is always different from what things are actually like, and it is our acting upon this mistaken perception that leads to suffering.

-- Chokyi Nyima Rinpoche