versus : The underlying PRINCIPLES of jiu jitsu , and indeed, all combat sports, are as fixed and permanent as the night sky; for they are rooted in the unchanging strengths and weaknesses of the human . The TECHNIQUES of jiu jitsu on the other hand, change with the and fluidity of the waters of a river, as they are based upon the minds of men who seek competitive advantage over each other through , study and innovation. Accordingly, stay true to the basic principles at all times, they will you sound direction with the reliability of a compass; but recognize that techniques must be in flux, with constant change and innovation in response to a changing landscape.