After the death of her first husband, Carol Paz took a vacation to Switzerland. Although she'd hoped that her sister and friend could go along, their schedules prohibited it.
So she went alone, spending time at such luxurious destinations as Interlaken and Zurich.
"I was surrounded by awe-inspiring beauty," she recalled, "but it was the loneliest trip I've ever been on in my life."
But from her solitude sprang an epiphany. During her trip, she was befriended by a couple from India who invited her to accompany them on sightseeing trips and to dinner.
"It made such a difference in …