Cosmic Shock

I had a conversation with a friend in which I was only a listener. The topic being "Karma and Life".
Since that day, I am shook. He mentioned that this life is unimportant. And that this universe exists  because there are witnesses to it: humans.
And I have been terrified since then. This is so true and yet people talk about belonging to certain cultures, identity, materials when the truth is that in the end of this life, everything will diminish into oblivion for us. We will no longer have an identity after we die. I will not be a male Sikh from India. I will just be one of the million souls transmigrating to wombs. 

I will die and everything will restart. For me.