Reciprocity Whenever human activities incorporate machines or rigidly prescribed procedures, the modes of human interaction change. In general, technical arrangements reduce or eliminate reciprocity. Reciprocity is some manner of interactive give and take, a genuine communication among interacting parties. Ursula M. Franklin, The Real World of Technology reciprocity
For one who can see Hundreds of people can talk for one who can think, but thousands can think for one who can see. Seeing and feeling thinkingunderstandingseeing