In this life there are only two points, material and spiritual. Material life, spiritual life. A point of spirituality and materiality, if you are spiritual you will have spiritual elements around you, like the yin yang the opposite is true for the materialist. Most of ninjutsu is spiritual, it's roots are in that, yamabushi monks. Yet there are many different styles of ninjutsu since there were many different families as well as needs, it's not a technique of fighting. It's more than having a good kick, it's having a good heart , every little piece (school) makes Koga. We of the Tong Amida Ryu focus on spirituality, our beliefs. Different schools are based on on what they value. For example-fighting, money, ect.