One belief is that time, the past, the future, everything in the universe already exists. It is only our biological nature that forces our experience of the universe to be one of moving through time with the future gelling and then solidifying into the past.
Another is the more common believe that we exist in a point in time and create the future as we go along through our own decisions.
Even the Bible seems split on this topic, do we have free will or not? I would suggest to you that free will is merely a frame of reference. From a reference outside of time, in which you can see all of time, there is no free will, the universe is just fixed, all of past, all of future, and in every direction. But from our biological perspective absolutely we do. And so we must make decisions and take actions that create the future we desire.