One day this question suddenly came up to me: how do deaf people who only know sign language think to themselves? Since when I think to myself, I sometimes have a kind of "voice" in my head composed of spoken language, I wondered what the inner thoughts feel like for them.
Later, I searched online and found something interesting. According to some sources, primarily, deaf people who only know sign language think in sign language----they sign in their heads when they are thinking. This strucks me as fascinating and beautiful. I just can't imagine how vivid their thoughts would be if they are all composed of sign language----it feels like watching a silent movie and there are a lot more alive and colorful visual elements present in their minds than mine.