I've been having deep thoughts that are driving me mad and making life seem unnatural. We have perceptions about the present, i mean, what i feel is what i feel at the present. Given that, how/why does the human being reason about the future and why does it seem so natural to prefer, for instance, a bigger reward later than a small reward now? I always used to think that, for instance, if i had several exams in a week i should study for all of them, and only after that should i go practice surf. I could simply surf during the time that i should be studying, i could have a pleasant moment sooner! If i study thought, i will be free to do all of that after the exams, but it will be LATER, not now. How can this work? If we perceive the present, how can we make choices that choose the future over the present? Is our brain magical? Can physics explain this? Is there some mathematical proof which shows that it is better to study now and have fun later than having fun now and having to study A LOT more later? Is it all subjective?