Time
What an interesting concept. This thing called time that seems to last forever but slips by us so fast. Seriously as a child we think that we have all the time in the world but as we mature and get older we are like where has the time went. People constantly put off what they can do today for tomorrow and then two weeks later it is still not done. Right now I could be wasting time or be doing something effective it all depends on how you look at it.