Your mind is a vessel capable of receiving and outputting different expressions or thought forms. It enlarges when the body weakens and shrinks when the body is rejuvenated and nourished.
Those thoughts you think are not yours. They come to you and you simply accept and reform them then send them out via your vocal chord. All humans are like transmitter that sends and receive thought vibrations which we Christians call "the word"
By this the whole universe was created!