The inter-relatedness of the world links us constantly with more people than our hearts can hold. Or rather—for I believe the heart is infinite—modern communications loads us with more problems than the human frame can carry. It is good, I think, for our hearts, our minds, our imaginations to be stretched; but body, nerve, endurance and life-span are not as elastic. My life cannot implement in action the demands of all the people to whom my heart responds. I cannot marry all of them, or bear them all as children, or care for them all as I would my parents in illness or old age. Our grandmothers, and even—with some scrambling—our mothers, lived in a circle small enough to let them implement in action most of the impulses of their hearts and minds. We were brought up in a tradition that has now become impossible, for we have extended our circle throughout space and time.