The mood of a warrior is such that it does not judge, it observes, to place yourselves in the place of a judge, your perspective would be to see things as good or bad, right or wrong, enough or not enough. This sets you up to always have to contend with an either or scinerio, always allowing the possibility of continually experiencing the negitive. If in your daily life you always think in terms of "if things were different" or if your focus is predominantly a state of being discontent, huge amounts of energy is invested, if for no other reason than just the fact of doing it, takes energy.  You also then need to invest equal amounts of energy in forgiveness. In judging there is a certian investment of energy and when negitive energy is stored it produces negitive results. Energy must then be invested in "dealing with" or in forgiveness to counter act the negitive impact and expel the negitive energy. As warriors, to become impartial observers gives us access to otherwise wasted energy. If you don't judge, if you just "see things as they are without forming an opinion", you save more energy. To be an active observer means to be in control of your self in the wake of unfolding events. It allows you a moments pause to think, and evaluate, the situation within the situaton, as it unfolds instead of reacting to judgements based soley on previous experience.