There is only NOW - this present moment
As you may know, I believe we're on a journey through the cosmos and are simply gathering information as we go and that's our Primary Function. That information is used to inform our journey and whole being (which is not simply this body we occupy for our time on this planet).
Recently though I've been learning about Zen Buddhism and like that philosophy as it is in some ways in tune with the above. Below is a video from a modernist Buddhist Teacher who's work I'm a fan of. Enjoy.