This from Masaaki Hatsumi's guidelines for the running of his dojo in Japan.

All those joining the Bujinkan must get an annual membership card. This card not only preserves the honor of the Bujinkan members, it indicates you are part of a larger whole - one whose members come together with warrior hearts to better themselves through training and friendship. It evinces the glory of warrior virtue, and embodies both loyalty and brotherly love.

The tradition of the Bujinkan recognizes nature and the universality of all human life, and is aware of that which flows naturally between the two parts:

The secret principle of Taijutsu is to know the foundations of peace.
To study is the path to the immovable heart.

We must put the heart of the warrior first, working together for self-improvement and for the betterment of the Bujinkan.