The achievement of this preparatory purification of mind begins with the challenge of self-understanding. To eliminate defilements we must first learn to know them, to detect them at work infiltrating and dominating our everyday thoughts and lives. For countless eons we have acted on the spur of greed, hatred, and delusion, and thus the work of self-purification cannot be executed hastily, in obedience to our demand for quick results. The task requires patience, care, and persistence — and the Buddha's crystal clear instructions. For every defilement the Buddha in his compassion has given us the antidote, the method to emerge from it and vanquish it. By learning these principles and applying them properly, we can gradually wear away the most stubborn inner stains and reach the end of suffering, the "taintless liberation of the mind."