Historian Paul Johnson writes that there is a certain rule in life worth considering—especially if confronted by a crisis. He calls it the Rhino Principle. A rhino is not a particularly subtle or intelligent creature, yet it has managed to dominate the savanna through sheer determination and aim. It takes initiative when it sees something it wants and puts everything into what it does best: charge!

When the charge is over, the object is either flattened or has gone a long way into cover, whereupon the rhino instantly resumes browsing. In life, we could all apply this concept as entrepreneurs with a startup idea, athletes training at the gym, or Casanovas wooing a girl. Charge!