To replace is to change one thing for another, not only in material aspects, but also to move from a previous situation to a later one. Time indicates movement and change, We can not remain static, and each new scenario is to complete the previous one or start new ones. From one second to the next, from one minute, one hour to the one that follows, the substitutions do not stop, the important is what we do with continuity and modifying variants. From childhood to youth, the maturity and old age. Physical support , the ability or not to think, feel and act is conditioned by the different ways of observing, valuing and projecting due to the accumulation of experiences and the impact on us. We can not be the same permanently, The obvious physical changes must be accompanied by a potential expansion that shows greater breadth of horizons and maturity. We always rely on bases that act as support, what we replace is related to transitory factors that are were the action aimed at executing the purpose of individual development with the corresponding improvements take place. The principles are unchangeable, They tell us how to proceed, from one context to another, where we must strive so that similar repetitions add a quality bonus. Nature is the reflection of what we have to do. We go from day to night, from night to day, from one season to another, from activity to rest, each one has its function, and the challenge is to learn, to broaden our perspective, so that in the new season, in the new day, we have taken advantage of what its peculiarities offer. Everything flows, therefore whoever wants to cling to relationships, conditions or privileges is pinching themselves. Appreciating what we have, changing if it necessary, and adapting continuously, there is no other way.