When someone understands 0 and ∞ can be used as algebraic symbol in calculations as units/quantum or smallest building blocks for numbers. He or she will also understand:
1*0 + 2*0 = 3*0
1∞ + 2∞ = 3∞
0 and 0+0 and 0+0+0+ . . .0 are different
∞ and ∞ +∞ and ∞ +∞ +∞ +. . . ∞ are different
and they will understand that without enumerating the ∞ number of even numbers and prime numbers, Goldbach’s conjecture can be proven.
熟悉中国文化的人都知道：天外有天，人外有人，神外有神，无穷之外有无穷。写一个请帖给万员外不一定要先画一万条短线。证明哥德巴赫猜想不一定要列举出∞ 个偶数和质数。
求解世界难题不难，缺的是用心去理解。世上无难事，只怕有心人。