Human reason can neither predict nor deliberately shape its own future. Its advances consist in finding out where it has been wrong.

The case for individual freedom rests chiefly on the recognition of the inevitable and universal ignorance of all of us concerning a great many of the factors …

Before we can try to remould society intelligently, we must understand its functioning; we must realise that, even when we believe that we understand it, we ma…

Ever since the beginning of modern science, the best minds have recognized that 'the range of acknowledged ignorance will grow with the advance of science.' 'I…

Reason, or the ratio of all we have already known, is not the same that it shall be when we know more.

Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower lev…

No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.