Almost all of human relationship is mediated by a screen of projections which goes both ways. Any harmony of projections is as much an accident as any dissonance, but the latter makes the screen potentially more visible, but also more unlikely. Primary emotions can cross the screen which is why there can be no real end to suffering, since as one's projections dissolve the suffering of others only becomes more apparent. Whether you have a duty to work to reduce that suffering is doubtful, but it would seem that there is a duty to tacitly show that you can see it.