The sand slowly trickles away, being replaced by something new. This plagues many people, as one day their ideas which they so meticulously thought out have gone out of style. The standards are called Form Classes. Form Classes are parts of speech, nouns, verbs, adjectives, etc. The rules are not always followed closely, but everything may be categorized into one or two form classes.
Adjectives are minor 'extras' in our language.
They enrich our language, giving vivid, clear concepts, describing the scene as we may not see it. Without them, we still have language, except a dead language. No one will use it, and it wills slowly fade away. A good example is latin. It is the base to many languages, though it is considered 'a dead' language.