The answer is observation. Observation is the gaining of information from a chief source. In living beings, observation works through the senses. In science, observation can also consist of the recording of data via the use of instruments. Greek philosophers move toward the big questions of life sometimes in an unpretentious scientific way, sometimes in mystic ways, but always in an imaginative fashion using observation.
According to manifest destiny, that America should be able to obtain Texas as well as the Oregon country. O' Sullivan said that it was for the "free development of our yearly multiplying millions".
