Answer:
His topic of human knowledge is worth the time and effort it requires.
Belief is a phenomenon few people can explain.
His theory of how humans obtain knowledge is questionable. Human knowledge is boundless.
Explanation: An essay pertaining to human understanding is a text by John Locke, an English Philosopher. The essay studies the foundation of how humans acquire knowledge. It is one of the most important texts of modern political philosophy and the basis of "empiricism".