Charisma on Command: Building Conviction
[Charismatic people] are simply displaying conviction through every physical method possible. Eye contact, tonality, flinching, muscle tension, breathing and myriads more. They are so minute that we don’t consciously pick up on them as an observer. But our subconscious processes them all and provides us with a feeling: “He’s lying,” or “He’s telling the truth.””
Your Work, Your Way 