In his 1841 essay "Self-Reliance", who wrote "Nothing is at last sacred but the integrity of your own mind"?

In computers or audio amplifiers, what is the process in which part of the output returns to the input? In English, which Texas city's name means "the body of Christ"? In Game 2 of the 1956 World Series he was knocked out in the second inning; in Game 5, he was perfect. Who is he? In "Henry VI, Part 1" it's a setting; in "Romeo and Juliet" it's a suitor for Juliet's hand. What is it? Whose oath begins "On my honor I will do my best to do my duty to God and my country"? In hunting, dogs sometimes chased their quarry up a tree but picked the wrong one, giving us which idiom? Which board decides whether prison inmates are released early under supervision? In July 1965, the No. 1 hit in the U.S. was which Rolling Stones classic?