In chemical terms, radium differs little from barium; the salts of these two elements are isomorphic, while those of radium are usually less soluble than the barium salts.
We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.
Pierre Curie came to see me and showed a simple and sincere sympathy with my student life. Soon he caught the habit of speaking to me of his dream of an existence consecrated entirely to scientific research, and he asked me to share that life.
Nothing in life is to be feared. It is only to be understood.
All my life through, the new sights of Nature made me rejoice like a child.
I am one of those who think like Nobel, that humanity will draw more good than evil from new discoveries.