The past is past, and the future is yet to come. That means the future is in your hands - the future entirely depends on the present. That realization gives you a great responsibility.
Isn't it really quite extraordinary to see that, since man took his first step, no one has asked himself why he walks, how he walks, if he has ever walked, if he could walk better, what he achieves in walking .. questions that are tied to all the philosophical, psychological, and political systems which preoccupy the world.