To step across the Foul Line is, in most Bowlers minds, an amateur mistake. It is an embarrassment in that it is evidence to all that we have lost our attention and focus or, worse still, tried to push our Approach to the point of cheating. But there is no one we cheat but ourselves, and no advantage we gain but the humbling of our self. We may laugh at others who cross the Foul Line, but it is only a misstep away from each of us. Stay true to your form and the Master’s guidance, and the Foul Line will not be a concern.