Mean to say teach people who have knowledge of listeners hear little but do not care to hear or listen to, but they could not understand. Make those who taught the first time.
Meant to say teach those with little knowledge I have. But the audience does not care to listen. Or listen, but could not understand. The people who preach that knowledge is wasted.
Mean teaching people with little knowledge to hear. But the audience didn't bother to listen. Or listen to, but was unable to understand. Make those who taught the knowledge that is a waste of time.