"A scientist must be a child. He must be curious. He must be eager to learn. He must be willing to make mistakes."

"Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves."

"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 am not afraid of anything. I am only afraid of not being able to do my work."

"I was taught that the way of progress was neither swift nor easy."