Acharya Prashant explains that the only reality is the present moment, as the past consists of memories and the future is merely imagination. He argues that real success cannot exist in an imaginary future; therefore, true success must be experienced right now. The human brain, however, is programmed by evolution to resist this simplicity because it functions within the domains of past and future. While the brain seeks success through the fulfillment of desires over time, life operates differently, where the examination and the result are concurrent and happen in the same instance.