The Buddha further explains that there is an "overall image of emptiness" which the bodhisattvas do "not" discard, this is:"the final separation of those images clung to by imagination, with all their varieties of defilement and purity, from both the pattern of other-dependency and the pattern of full perfection: the complete nonattainment [of such imagined things in those of consciousness."The Buddha also notes that the cause of the practice of calm and insight meditation is said to be "purified discipline and true insight accomplished through purified hearing and reflection."