"The fundamental laws necessary for the mathematical treatment of a large part of physics, chemistry and most of biology are thus completely known, and the difficulty is only that the exact application of these laws leads to equations much too complicated to be soluble."
"The fundamental laws necessary for the mathematical treatment of a large part of physics and the whole of chemistry are thus completely known."
"A theory with mathematical beauty is more likely to be correct."
"The most important thing is to have the right to think for yourself."
"In science one should not proceed along the lines of personal preference."