A speech-related gesture is an outward expression of an inward condition. It is merely the effect of a mental or an emotional impulse expressed physically. You may rarely know in advance what gestures you will use to make a point. You may use one gesture to support your message one day and another on a different day. The gesture is subordinate to the message. You might count off the points on your finger, you may point with your full arm extended to some object or direction, you may outline sizes and shapes, or you might use a gesture to show emphasis.