The self is like a OS.

The ego is like the kernel of a operating system. Hindus are wrong saying the ego should be destroyed, if you destroy the kernel, the whole pc cannot function. The ego like the OS is needed, but frequently there will be virus, corrupted programs, bad programs, thus mindfulness is the antivirus program.

Karate is like the hardware of the pc. The stronger the hardware like RAM and CPU, the better the OS (self) will perform.

THe rest of the philosophy is other modules in the OS which is also required.