Why is it Important to Learn a Foreign Language?

Knowing a foreign language is very important, it opens many doors for us. I am a future programmer and if I learn foreign languages I will have more achievements. I think every person is obliged to know another foreign language in addition to his native language. We Armenians know Russian very well and can speak freely in our region. but it seems to me that it is not enough, in order to feel yourself fully, you need to know English. I said English because English is the international language. every second person speaks English fluently, and knowing it will make our life in a foreign place much easier. I have understood one thing, if you know foreign languages and communicate freely with people, then the world is in your hands.