Observations always involve theory.

All nature is a vast symbolism: Every material fact has sheathed within it a spiritual truth.

Equipped with our five senses - along with telescopes and microscopes and mass spectrometers and seismographs and magnetometers and particle accelerators and detectors sensitive to the entire electromagnetic spectrum - we explore the universe around us and call the adventure science.

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.

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