Language is only a medium for communicating one’s thoughts to another. It is called in only after thoughts arise. Other thoughts arise after the “I”-thought arises and so the “I”-thought is the root of all conversation. When one remains without thinking one understands another by means of the universal language of silence.
Silence is ever speaking. It is a perennial flow of language which is interrupted by speaking. These words I am speaking obstruct that mute language. For example, there is electricity flowing in a wire. With resistance to its passage it glows as a lamp or revolves as a fan. In the wire it remains as electric energy. Similarly also, silence is the eternal flow of language, obstructed by words.
What one fails to know by conversation extending to several years can be known instantly in silence.