"The best father a son or daughter could have," the 43rd president said, holding back tears.
Curry is the first African-American to lead the Episcopal Church.
George W. Bush spoke to his father by phone as the end neared.
Joseph James Pappas had treated the former U.S. president in 2000.
As America's First Volunteer, Barbara Bush has had to cut back on what she loves best: the hands-on volunteer work that has given her so much satisfaction over the years.
"We got closer together for a family photo and it was like, 'Holy crap!'" the 55-year-old woman told CNN. "It was like a gentle squeeze."
One thing seems inevitable: It's about to get a lot worse for these Jeb Bushes and Ted Cruzes.