The great spirals... apparently lie outside our stellar system.

The universe is unfolding as it should.

The outstanding feature, however, is the possibility that the velocity-distance relation may represent the de Sitter effect, and hence that numerical data may be introduced into discussions of the general curvature of space.

A scientist naturally and inevitably ... mulls over the data and guesses at a solution. He proceeds to testing of the guess by new data-predicting the consequences of the guess and then dispassionately inquiring whether or not the predictions are verified.

Science is the one human activity that is truly progressive. The body of positive knowledge is transmitted from generation to generation.

The great spirals... apparently lie outside our stellar system.

Observation always involves theory.