No Man is an Island

"[W]e should recall that no man is an island, entire of itself. Our lives are involved with one another, through innumerable interactions they are linked together. No one lives alone. No one sins alone. No one is saved alone. The lives of others continually spill over into mine: in what I think, say, do and achieve. And conversely, my life spills over into that of others: for better and for worse. So my prayer for another is not something extraneous to that person, something external, not even after death. In the interconnectedness of Being, my gratitude to the other—my prayer for him—can play a small part in his purification. ... It is never too late to touch the heart of another, nor is it ever in vain. In this way we further clarify an important element of the Christian concept of hope. Our hope is always essentially also hope for others; only thus is it truly hope for me too. As Christians we should never limit ourselves to asking: how can I save myself? We should also ask: what can I do in order that others may be saved and that for them too the star of hope may rise? Then I will have done my utmost for my own personal salvation as well."
~Pope Benedict XVI (Spe Salvi, ¶48)