Can we think without language ?

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Everyone has a language using which they talk to themselves. When someone asks you a question in a different language than your native tongue, we generally convert the content put at us into the language comfortable to us. Bur imagine if language did not exist. It would be very difficult for you to communicate with anybody. You may then try to use hand motions, eye and body gestures to convey a message which might work like sign language. But how would you communicate with yourself. You might not be able to give yourself instructions because there doesn't exist a carrier (language) to convey stuff to your brain. For ex. If you wanted to plan your day ... You say to yourself- "I need to wake up at XX hrs and do the necessary packing to get myself prepared for leaving to the airport". Without language you cannot convey this message to your brain, due to the lack of a communication medium, which would channel and make sense of individual words into sensible information (language), using some combinations (grammar rules). But this idea is WRONG !! Our brain can actually think and function without language with ease. Our brain can, not only process verbal information but also visual information. Our eyes make pictures which are stored in the brain. Using these images our brain reconstructs different scenes from the pictures in our memory. So for the above example our brain will think and bring pictures into memory when we try to plan the day. The brain would probably contain a picture of the clock which would mean to wake up and then an aeroplane to remind that you need to go to the airport. food for thought - If we actually never had language in the present world and if we all communicated through hand and body movements, our minds would have expanded immensely and the world would seem more visual, scenic and picturesque.