Your speech is a reflection of your thoughts. Your inner life is created by the way you think. If you want to know your inner life, first examine your speech. The more you study your speech, the more the contents of your mind are revealed. Study the connection between speech and mind, and you will find that speech is the means through which the mind expresses itself.
Source: The Tradition of the Himalayan Masters Pandit Rajmani, Ph.D. Tigunait