Stuff in mathematics

The very basic thing is the functions when approaching mathematics. When you say function then it has some value say for 1,2,3 and also perhaps -1,-2,-3. The concept of limits and continuity arises. Newton struck his unsurpassable genius here. He made calculus out of limits. Rest is history.

There is one point I would like you to think about. You say this is an apple. This is an orange. Don't you have doubts? Shouldn't you have doubts to be so certain? Are you perfect? Should you not correct yourself and express yourself better? Welcome, Gauss. There are two views. And you become the third. 

Newton seems correct because of presence of field. Gravity or others. Which seem to make numbers. Hence the function. And so the calculus.

So are there numbers or not? What about primes? I am confused here. The prime numbers thing. Euler made such powerful equations on primes. And Euler totient function too.

This is what I understand. This is what I feel.

Have a great day, dear readers !!