The mathematical and scientific facts, laws, or principles are dictated by the nature. We, humans, only discover them and find relations between them - how one affects the other. This is the essence of objectiveness of scientific approach where one couldn't incorporate one's own personal beliefs and prejudices in one's findings.

It's true that almost all the languages around the world share some similarities between them. I haven't ever consulted any grammar book on my native language except when they forced me to memorize some of it in the schooldays. That's why it's called the native tongue. I remember once someone, I believe it was Amy (Yankee), who told me that a preposition is always followed by a noun phrase. This a kind of rule in English language. Who made this rule? Why can't one break this rule? A language is not an invention of a single individual - it's a colllective ownership. I'm sure there would be many other rules of this kind and surely I have practiced them infinite times. In general, how such rules come into being? Please do list some of them. I'm not a linguist, so I request you to keep your approach simple and straightforward. Thank you.

a function word that typically combines with a noun phrase to form a phrase which usually expresses a modification or predication
[M-W's Col. Dic.]
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Comments  (Page 4) 
Hi BaldKing

Thanks for your valuable contribution. I hope you like the forums and would keep helping me.

Even native speakers have problems with English spelling, so it goes without saying that English spelling must be one of the most difficult of all languages.
Well, non-native learners often (usually) learn from a book and learn the spelling more or less as they go. Spelling might even be a non-existent problem for the non-natives.
Students: We have free audio pronunciation exercises.