Thinking out loud - or rather on line.
Language consists mainly of words and the rules on how to use them and words are the symbolic representations of concepts or objects. Concepts and objects obviously exist whether or not there are symbols for them; in fact we don't need symbols for something unless we are going to think about or try to communicate about it. But we like to name things and so we create words for those concepts which are important to us. For example ask a skier and a non-skier how many kinds of snow they can name. Because it is easier to mentally juggle concepts, or think about things, when we have symbols for them we tend to think mainly about concepts we have words for.
Thus it becomes circular. Thinking creates language and yet language can limit thinking.
This is why learning a language can teach you so much about the culture that created it.