If a person is a wise man, then he must be a humble person; and a person can only be humble if he recognizes his deficiencies. However, if a person cannot listen to the opinions of others, then he will not realize Own deficiency. It can be inferred from this:. ['A person is a wise man if he recognizes his deficiencies.', 'A person is not a wise man if he cannot listen to the opinions of others.', 'If a person listens to the opinions of others, he will realize his deficiencies.', 'If a person does not recognize his own shortcomings, he must not listen to the opinions of others.']