What is the purpose of thoughts?

Why are there thoughts during the awakened state? To make decisions we seem to require but a few thought. Why does the mind need to be used in other times? There must be a purpose in creation? What is the nature of the mind? Is it to solve problems. But there is aversion or at least some effort in disciplining the mind for example in meditation, mathematics, logic etc. Is the mind to solve body related issues by giving the body the maximum possible sensation of pleasure? By reliving pleasurable moments. But why then do we also hold on to anger and fear? Are emotions a way for the body to regurgitate sensations onto the body? Is the ultimate goal a safe survival mechanism? But why the constancy of thought? Is that a problem of the modern man.