The following aspect interpretations apply only to natal or birth charts. Please see Synastry aspects for comparison charts, and Interpreting transits for transit aspects.
Saturn opposition Moon indicates pessimism and gloominess, and a fear of failure combined with Saturn's will and strength to work and endure. Dashed hopes are so painful for these people that they may use their pessimism like a chart (e.g. "If I get my hopes up what I want won't happen, so I will just expect the worst and maybe be pleasantly surprised if I'm wrong"). The problem with this little mind game with the self is that it discourages help and motivation from others and it may keep these people from opportunities they might otherwise enjoy. Taking the safe route is not always the most successful or satisfying way. In fact, the fear of taking risks and pursuing one's true desires contributes to the negative results that feed the pessimism of Saturn opposition Moon people.