Terri could easily have had a medical directive.
Matthew 25:35-40. For I was hungry, and you gave me to eat: I was thirsty, and you gave me to drink: I was a stranger, and you took me in: Naked, and you covered me: sick, and you visited me: I was in prison, and you came to me.
Then shall the just answer him, saying: Lord, when did we see thee hungry and fed thee: thirsty and gave thee drink? Or when did we see thee a stranger and took thee in? Or naked and covered thee? Or when did we see thee sick or in prison and came to thee? And the king answering shall say to them: Amen I say to you, as long as you did it to one of these my least brethren, you did it to me.
That is a great passage.