“Humans perceive time as something linear.  For some, the future runs into the present, which runs into the past.  For others, the opposite.  For others, the present runs into both future and past.  For others still, time does not exist at all.  But we can’t deny that we are different than we were last year.  Time, like walking towards the horizon,  seems linear, but is actually cyclical.  The past and future are not two ends of a spectrum but two directions on a circle.”