71. Amīr al-mu’minīn, peace be upon him, said: As intelligence increases, speech decreases. 
 Talkativeness is the result of diffused thinking while diffusion of thought is the result of the unripeness of wisdom. When wisdom attains perfection and understanding ripens one's mind, and thoughts are balanced, and wisdom acquires power and control over the tongue, as over other parts of the body, the tongue does not act without thinking or outside the dictates of wisdom. Obviously, uttering after thinking is short and free from extras. As a man’s intelligence increases his speaking decreases and he does not speak save at the opportune moment.