Cairo, Egypt “Spirit,” wrote the Jewish philosopher Martin Buber , “is not in the I but between I and you.” He wrote this in a 1923 essay translated into English as I and Thou . Here’s another line from the essay: “Egos appear by setting themselves apart from other egos. Persons appear by entering into...

"For it is not only indolence that causes human relationships to be repeated from case to case with such unspeakable monotony and boredom; it is timidity before any new, inconceivable experience, which we don't think we can deal with. But only someone who is ready for everything, who doesn't exclude any experience, even the most...