With only one kind of force, an enemy, from within a fort, can assail the whole country of even a powerful and prosperous king.
एकाङ्गेनापि सम्भूतः शत्रुर्दुर्गमुपाश्रितः। सर्वं तापयते देशमपि राज्ञः समृद्धिनः॥