In the universe there is no meaning nor is it meaningless

[Angrboda]

We look on things as good and bad because we experience them as having those qualities. That is our reality, the experiencing of things in our environment being imbued with qualities like beauty, desirability, goodness or badness and so on. We look upon the world as having these qualities because our experience of the world includes these properties.

The question of why we think about past and future may be best explained with reference to what in biology is known as the Red Queen problem. The Red Queen is a reference to the story of Alice In Wonderland, in which, the Red Queen said that you have to keep running just to remain in place. In biology, the Red Queen problem refers to the theory that life is such a constant struggle against real and potential competitors, that life forms must continually innovate and change just to retain whatever reproductive advantage they currently have, as all their competitors in the environment are doing just that; if you rest on your laurels, you lose the game of life because your competitors won't be so obliging as to do the same. So consideration of the past and future is necessary in order to maximize the fitness of one's response to events and circumstances in the environment. And it's important that you do it, it's built into you to do it, because in prior generations, only those reproductive competitors who did do it outbred the competitors, including those that didn't do it. You consider the past and the future because you were built that way, contingently, as a consequence of your evolution. Does this mean you should continue to do this? That depends on whether you consider the cost of not doing it to be commensurate with the benefits of stopping. Oh no! You're doing it again!