You can learn a lot by listening.
When you speak you remove a veil from yourself and allow others to connect with your personality, values, or feelings. That’s all it is. Projecting your thoughts can only connect you with people if the listener understands.
The source of knowledge is the consciousness that can listen to all, and yet allows no one to peak beneath its veil. Physicality is blanketed from the inner vibration that is life. The connected consciousness only buzzes the hum of what is true bliss.