The process thus is as follows. After the mind of a man has been cleaned of all impurities through works performed in many preceding states of existence, without a view to special forms of reward, there arises in him the desire of knowledge, and thereupon--through knowledge itself originated by certain scriptural texts--'Being only, this was in the beginning, one only without a second' (Ch. Up. VI, I, 2); 'Truth, Knowledge, the Infinite, is Brahman' (Taitt. Up. II, 1); 'Without parts, without actions, calm, without fault, without taint' (Svet. Up. VI, 19); 'This Self is Brahman' (Bri. Up. II, 5, 19); 'Thou art that' (Ch. Up. VI, 9, 7), Nescience comes to an end. Now, 'Hearing,' 'reflection,' and 'meditation,' are helpful towards cognising the sense of these Vedic texts. 'Hearing' (sravana) means the apprehension of the sense of scripture, together with collateral arguments, from a teacher who possesses the true insight, viz. that the Vedânta-texts establish the doctrine of the unity of the Self. 'Reflection' (mananam) means the confirmation within oneself of the sense taught by the teacher, by means of arguments showing it alone to be suitable. 'Meditation' (nididhyâsanam) finally means the constant holding of thai sense before one's mind, so as to dispel thereby the antagonistic beginningless imagination of plurality. In the case of him who through 'hearing,' 'reflection,' and meditation,' has dis-dispelled the entire imagination of plurality, the knowledge of the sense of Vedânta-texts puts an end to Nescience; and what we therefore require is a statement of the indispensable prerequisites of such 'hearing,' 'reflection,' and so on. Now of such prerequisites there are four, viz. discrimination of what is permanent and what is non-permanent; the full possession of calmness of mind, self-restraint and similar means; the renunciation of all enjoyment of fruits here below as well as in the next world; and the desire of final release.