“I cannot, whilst President of the United States, descend to enter into a newspaper controversy.”— James K. Polk, thoughtco.com
“Wherefore we must have these mutinies and discords that are grown amongst us redressed, for by the life of God, it doth even take my wits from me to think on it. Here is such controversy between the sailors and gentlemen, and such stomaching between the gentlemen and sailors, it doth make me mad to…”— Francis Drake, amazon.com
“I am continually fascinated at the difficulty intelligent people have in distinguishing what is controversial from what is merely offensive.”— Nora Ephron, books.google.com
“A possible link between madness and genius is one of the oldest and most persistent of cultural notions; it is also one of the most controversial.”— Kay Redfield Jamison, amazon.com
“Change is scientific, progress is ethical; change is indubitable, whereas progress is a matter of controversy.”— Bertrand Russell, amazon.com