The confusion of the past [in particle physics] is now replaced by a simple and elegant synthesis. [This] standard theory may survive as a part of the ultimate theory, or it may turn out to be fundamentally wrong. In either case, it will have been an important way-station, and the next theory will have to be better.

Physics 1971-1980, Towards a Unified Theory - Threads in a Tapestry, World Scientific Publishing Co. Singapore, Malaysia. 1992