Read the excerpt below and answer the question. is certainly a subject, even for its nobleness, worth our labour to inquire inquire into the original, certainty, and extent of human knowledge, together with the grounds and degrees of belief, opinion, and assent ("an essay concerning human understanding") what is the best explicit meaning of the john locke's excerpt? the 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.