The universe is unfolding as it should.

The history of astronomy is a history of receding horizons.

Equipped with his five senses, man explores the universe around him and calls the adventure Science.

Not until the empirical resources are exhausted, need we pass on to the dreamy realms of speculation.

The great spirals, with their enormous radial velocities and insensible proper motions, apparently lie outside our Solar system.

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.

Wisdom cannot be directly transmitted, and does not readily accumulate through the ages.