What is the consequence to living life with self realism behavior?
Any seed's highest behaviour is to blossom into a full-fledged state which is fruit, flower etc similarly Humans can be full-fledged beings which are in the state of Blissfulness and other pleasant states if he/she gives proper attention to achieve this.

I must tell you this when you are thinking about the past there is only one moment which the moment we are living now there is no other moment cause past and future are just a phrase one can never go to future (and yes we should prepare for future) or the past so it's just in our mind only.

If you are aware enough then there should not be any thoughts come into your mind about sadness you just feel joyful about being alive. Most of the humans unconsciously think they are immortal but once you know or understand that you are mortal, you will do things only which are precious or important to you in life.

Thanks for reading.