All men are liable to error; and most men are, in many points, by passion or interest, under temptation to it. — John Locke

No man's knowledge here can go beyond his experience.

Preference of vice to virtue, a manifest wrong judgment.

Since sounds have no natural connection with our ideas ... the doubtfulness and uncertainty of their signification ... has its cause more in the ideas they stand for than in any incapacity there is in one sound more than another to signify any idea.