A small Linguistics Result

 There are 2 kinds of sentences and 9 tenses. The simple present tense corresponds to one of the 2 types of sentences - GENERALITIES. The rest 8 tenses correspond to the other type of sentences - EVENT.

Generality (E.g. - This is my book. The earth moves round the sun.) and Event (E.g. JOhn stole my book. Jack was born.) are the 2 kinds of sentences. And every Generality implies an Event in the past.

Another way of putting all of the above is that sentences i.e. knowledge can be timeless or time-dependent. The parameter of classification here is Time.

This statement has another deep implication - it means that time existed always and will exist always.