K SIVA PRASAD Retired senior IAS officer in the Punjab Government Krishna says ‘sat’ (reality/permanence) never ceases to be and ‘asat’(unreal/impermanence) has no existence. A jnani is the one who can distinguish between the two (2.16). The rope and snake analogy is often quoted in many cultures to understand the intricacies of ‘sat’ and ‘asat’..