"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 must be attained…"

"All my life through, the new sights of Nature made me rejoice like a child."

"A scientist in his laboratory is not only a technician: he is also a child placed before natural phenomena which impress him like a fairy tale."

"I have no dress, except the one I wear every day. If you are going to be kind enough to give me one, please let it be practical and dark so that I can put it on for laboratory work. And I am proud of …"

"There are sadistic scientists who hurry to hunt down errors instead of establishing the truth."