To discriminate between good and bad, one must resort to scriptures. The Vedas emerged from the Divine Himself and were ‘heard’ by sages attuned to the voice of the Divine, who in turn, taught them to their disciples. This process of imparting the Vedas and the wisdom enshrined in them has continued through many generations ofGurusand disciples until now. The Upanishads, the Brahma Sutra and the Bhagavad Gita contain the very essence of the Vedas. Hence these are designated as ‘three fundamental texts(Prasthana traya)’ of the science of spirituality. Acquisition of higher knowledge alone can fulfil the main purpose of human life; it makes one aware that one is not the inert non-sentient body but an embodiment of being-awareness-bliss. When this truth dawns and is experienced, you are freed from the fog of ignorance and are liberated, in this very life. (Sutra Vahini, 'Stream of Aphorisms of Brahman'.)