Two hear better than one, but one can hear better than two when one is known or when one is given knowledge or acknowledgement. And two can begin to confuse what they heard when one of them repeats it!
Because in truth, no two individuals can hear exactly the same because no two individuals have exactly the very same knowledge or do not use knowledge the very same way! And so one in truth hears or one even sees according to the true knowledge one already has and if one is not certain of oneself, because of lack of confidence or knowledge, the less one hears or the less one sees no matter how good the hearing or the sight may be!
Thus, truly know yourself and truly know what you truly know so that you can truly hear and then truly see what was truly heard that now is truly seen!