Change is the only element of life which is constant. Though it sounds contradictory, it is true. Change is the most important element of life. It is this change that defines life. Had there been no change, life would have become still. We can see that change occurs in all natural phenomenons such as weather and time. Change is also a vital element in any relationship. If there are no alternating periods of highs and lows then any relationship will become stagnant. Change keeps the relationship and life going and gives reasons for living.
Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of his world.
Rachel Carson
