Be less curious about people and more curious about ideas.

Response to a reporter seeking an interview during a vacation with her husband in Brittany, who mistaking her for a housekeeper, asked her if there was anything confidential she could recount, as quoted in Living Adventures in Science‎ (1972), by Henry Thomas and Dana Lee Thomas

This is stated to be a declaration she often made to reporters, in Madame Curie : A Biography (1937) by Eve Curie Labouisse, as translated by Vincent Sheean, p. 222

In science, we must be interested in things, not in persons.