The words of men fade with time because man is not expected to live forever. God has the capacity to keep His words and promises in our lives. He will not alter the words of His mouth or promises. There is no strength in man to fulfill any of God's plans and promises for you, except he is chosen. Of you don't seek to know His promises for you, how could you possibly make a petition to Him? Jesus came for the sick and ready to heal and clean your body. He is waiting for you to ask and willing to you as many time as possible.