The lack of feeling was a tool used by the ninja so that they could learn how to avoid manipulation and in turn manipulate others. Since my childhood I've noticed quite a lot of foolishness in the world. Small, pointless, sometimes even nonexistant things people have worried about.
For example, when i was very young, i was walking ahead of someone, from behind they asked me a question. Without turning around, I answered them. For one reason or another they saw me not looking at them, during quite possibly the most pointless conversation I've ever had, as a serious offense. I saw this emotional reaction as quite pointless, after all I answered the question, what more did he need?
I was raised a Christian. Good and Evil, Heaven/Hell, all that shit. And although i believed in good and evil at the time, i never really...felt it you know? I had always had an interest in the ninja, i eventually bought a book about ninjas on Ebay, called The Ninja and Their Secret Fighting Art. Through this i learned of the realm of the spirit. And the concept of advancing through stages in the mind.
Unlike the samurai, the ninja had no family name to defend. No honor to protect. No strict code of conduct. Through this they were able to do the work of an army with a single person. Through their beliefs, which was eventually called the Mikkyo sect of Bhuddism, they were able to rid themselves of all suffering. I however, have no interest in Bhuddism, they care far too much about morals and whatnot. It's through the ninja that i learned of Taoism.
Through the study of taoism, all is eventually made clear. And all suffering is eliminated quickly and efficiently. You see, when you were first born. You were one with the Tao, throughout the years, you ventured further and further away from the roots, you were born ignorant, not stupid. Education has spread stupidity like a virus. You had no desires, you had no morals, no emotion. No education. You had no problems at all.
Upon returning to the roots, that is when enlightenment is made possible. No longer are you buffeted helplessly between poles of good luck and bad. Taunted by gods and devils. You are simply one with the process. When the ultimate reality reveals, dualism dissapears. When you see all as one, you've returned to the roots. And from there, you can only improve.
I'd be interested in discussing this further at a later time. Do not try to make people understand you, this type of thing isnt something everyone can understand. Only 1 in 10,000 people ever will. The very concept is by today's standards absurd. But that's what makes it what it is. To quote the book "The unfettered mind" If you follow the world, you will turn your back on the way. If you would not turn your back on the way, do not follow the world.