A theorist today is hardly considered respectable if he or she has not introduced at least one new particle for which there is no experimental evidence.
Steven WeinbergThere is now a feeling that the pieces of physics are falling into place, not because of any single revolutionary idea or because of the efforts of any one physicist, but because of a flowering of many seeds of theory, most of them planted long ago.
Steven WeinbergA physicist friend of mine once said that in facing death, he drew some consolation from the reflection that he would never again have to look up the word "hermeneutics" in the dictionary.
Steven Weinberg