Real spiritual knowledge is based on the discrimination of spirit from matter, and it is cultivated by scriptural evidence, austerity, direct perception, reception of the Purāṇas’ historical narrations, and logical inference. The Absolute Truth, which alone was present before the creation of the universe and which alone will remain after its destruction, is also the time factor and the ultimate cause. Even in the middle stage of this creation’s existence, the Absolute Truth alone is the actual reality.