By contrast, the weak and indecisive and more unsuccessful hitter is more often nervous and twitchy and tentative. He is concerned about his form and his movements are tight, jerky and uncontrolled. Because he is uncertain and full of doubt, his movements are rushed and uncoordinated. His bodyparts are not linked, and because of this disconnect, he is unable to bring to bear a mighty, concentrated burst of power. His swing is disjointed and weak. He attempts to make mere contact with the ball and is often content to put the ball in play.
In order to become a great hitter, think of executing each and every swing with maximum power, force and speed. Never take a slow, lazy, weak swing lest it become habit. Think only of releasing every ounce of force in your body to and through the baseball. Swing hard, and swing great.