Definition 3. If the sequential (or continuous) superpositions of finite quantities only stay in the finite range (namely, an incrementally increasing value can only stay in a finite range and does not reach infinity), then how can the superpositions of infinitely many quantities be achieved? I find that superposing by the change in direction can indicate the accumulations of the infinitely many as shown in Figure 2. The infinitely great is reached by the superpositions or accumulations of infinitely many finite quantities by the change in direction. The change in direction is equal to the definition of the infinitely great that we can't talk about anything outside of it and can compresses any quantities outside of it to nothing ,and can not be reached by extending forever of finite quantities.