Language provides the forum for us to share ideas. Language allows us to grow and change as indivduals and as a collective body. The use of language at the interpersonal level is a necessity. Language allows us to develop bonds between other human beings and ourselves. To feel a connection to another idividual is a powerful thing.
Language keeps our relationships between family and interpersonal partners more intimate.
The ability to share feelings and develop trust is accomplished through language. Language can also affect us at a broader level. Socially through language we intertwine with other cultures. Being able to share ideas from another culture allows us the ability to expand our own culture. We can also gain insight into things that are not available in our geographical area.