You cannot lead without passion. Passion causes things to move, and passion creates a force multiplier. Passion actually covers a multitude of sins. Real EntreLeaders care deeply, and that is basically what passion is. Passion is not yelling or being wild; it is simply caring deeply.
EntreLeadership: 20 Years of Practical Business Wisdom from the Trenches (ed. Simon and Schuster, 2011) - ISBN: 9781451618235