One of the most surprising forms of nonverbal communication is the way we automatically adjust the amount of time we spend looking into another's eyes as a function of our relative social position.

The pitch, timbre, volume, speed, and cadence of your voice, the speed with which you speak, and even the way you modulate pitch and loudness, are all hugely influential factors in how convincing you are and how people judge your state of mind and character.

People spend a lot of time talking and thinking about how members of the opposite sex look, but very little time paying attention to how they sound. To our unconscious minds, however, voice is very important.

Leonard Mlodinow Quotes