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In the second stage, even our intellectual beliefs are called into doubt.

he wanted to know if every thing he learn was a lie

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Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

because we know how things fall

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This theory was first proposed by Nicolas Copernicus. Copernicus was a Polish astronomer. He first published the heliocentric system in his book: De revolutionists erbium comestible , "On the revolutions of the heavenly bodies," which appeared in 1543.

this is how we look at things now

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In astronomy, the geocentric model (also known as geocentric, or the Ptolemaic system) is a superseded description of the universe with Earth at the center. ... The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those of Aristotle and Ptolemy.

this how we we used to think

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a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

This is important because we still have it

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The scientific revolution is a concept used by historians to describe the emergence of modern science during the early modern period, when developments in mathematics, physics, astronomy, biology (including human anatomy) and chemistry transformed the views of society about nature

This is important because we still have it today.