Relative knowledge pertains to the mind and not to the Self. It is therefore illusory and not permanent. Take a scientist, for instance. He formulates a theory that the Earth is round and goes on to prove it on an incontrovertible basis. When he falls asleep the whole idea vanishes; his mind is left a blank. What does it matter whether the world remains round or flat when he is asleep? So you see the futility of all such relative knowledge. One should go beyond relative knowledge and abide in the Self. Real knowledge is such experience, and not apprehension by the mind.