One never notices what has been done; one can only see what remains to be done.
Letter to her brother (1894)
Be less curious about people and more curious about ideas.
Reply to a reporter, quoted in Eve Curie, Madame Curie (1937)
Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something, and that this thing, at whatever cost, must be attained.
Quoted in Eve Curie, Madame Curie (1937)
All my life through, the new sights of Nature made me rejoice like a child.
Pierre Curie (1923), translated by Charlotte and Vernon Kellogg
Nothing in life is to be feared, it is only to be understood.
Widely attributed; no primary source located