First, the smallest number.
The ancient and huge family of natural numbers consists of all natural numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ... The smallest one is "1", and the largest one can't be found. You can look for it if you are interested.
Second, there is no maximum natural number.
Maybe you think you can find a largest natural number (n), but you will immediately find another natural number (n+ 1), which is greater than n, which means that you will never find the largest natural number in the family of natural numbers.
Thirdly, mathematics is a rational spirit, which enables human thinking to be applied to the most perfect degree.
Mathematics has made an important contribution to observing nature. It explains the simple primitive elements in the regular structure, with which celestial bodies are built. Kepler
Some beautiful theorems in mathematics have such characteristics: they can be easily summarized from facts, but the proof is extremely hidden. Gauss