Meditation doesn't help if your land and house are being napalmed by by US B52 bombers from above, as happened in Vietnam. Or could it? when you fight back, staying focussed in the now and not getting hung up on past failures will allow you to win. When you fight back, accepting reality for what it is (i.e. I might very well die) and simply doing what needs to be done in each moment with no expectation of success will allow you to win, at least within your mind if not physically. Once you commit your life to a cause then even death cannot scare you, and thus you are easily able to enter the now without worrying about the future.