In the book "The Power of Now"it's written that to the ego, the present moment is hardly exist, only past and future are considered important. We all know how having the ego will ruined our lives, our ego would initiate different kind of problems such as jealousy, envy, greed, worry, anger, etc.
If we are completely present, the external forces are no longer a problem. In the present there is only we and our surroundings, and not other things you need to worry about. Let's be aware and mindful to ourselves and our surroundings.