The greatest of the changes that science has brought is the acuity of change; the greatest novelty the extent of novelty.

The greatest of the changes that science has brought is the acuity of change; the greatest novelty the extent of novelty.

Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search.

It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them.

In the material sciences these are and have been, and are most surely likely to continue to be heroic days.

Both the man of science and the man of action live always at the edge of mystery, surrounded by it.

Science starts with preconception, with the common culture, and with common sense. It moves on to observation, is marked by the discovery of paradox, and is then concerned with the correction of preconception. It moves then to use these corrections for the designing of further observation and for more refined experiment. And as it moves along this course the nature of the evidence and experience that nourish it becomes more and more unfamiliar; it is not just the language that is strange [to common culture].