How to arrive at absolute morality and what it is

One arrives at absolute morality by taking assumptions and finding their absolute rational nature. First, assume that you should be nonviolent. After years of nonviolence, you realize that there is no way that violence is the answer. It is a combination of the empirical experience and the rational generalization. After testing out nonviolence, or honesty, 100% of the time, it is easy to see that there is no other way. 

Sometimes religious leaders say, "you have to experience it to know it. Without the experience you can't know. It can't be explained." This is a half truth. You do need the experience to know something, but the explanation is equally important. This is the explanation: Speak the truth, and be kind. Those are absolute imperatives. The experience of this proves its validity. If you don't wish to prove the validity of nonviolence and honesty, then simply don't try them out.  However, if you wish for metaphysical certitude then you should try out the correct things. These are the correct things.