The essence of ninjutsu is not only to persevere and survive, but also to thrive by living life to its fullest potential. Accomplishing this requires dedication to universal principles of justice and understanding of the nature of all the elements in the world in which we live. The warrior must strive to eliminate preconceived notions, assumptions, and behavioral programming and instead view and accept things for what they truly are. Ego serves no purpose for the ninja and tolerance is paramount. Unfortunately, not all people share this view and invariably try to exert their wills on others. This is done through political and philosophical manipulations as well as through physical force. The ninja, therefore, serves as the balance to protect themselves and others from these influences and acts of intrusion.