Acts 18:24-26

Now a Jew named Apollos, a native of Alexandria, came to Ephesus. He was an eloquent man, well versed in the scriptures. He had been instructed in the way of the Lord; and being fervent in spirit, he spoke and taught accurately the things concerning Jesus, though he knew only the baptism of John. He began to speak boldly in the synagogue; but when Priscilla and Aquila heard him, they took him and expounded to him the way of God more accurately.

To be ignorant is not the same thing as being stupid or foolish.  It is merely to lack adequate information.  The wise man passes from ignorance to education with gratitude and does not feel foolish when somebody who knows more than he offers to educate him.  Apollos was wise.  To him who had, more will be given (Mt 13:12).  The fool, by contrast, resents instruction.  When it is pointed out that he doesn't quite know what he's talking about, he bristles defensively and doesn't want to hear from those who know more than he.  If he is deeply foolish, he actually fights against those who would educate him and makes both himself and his hearers stupider than they were to begin with.  To him who does not have, even what he has will be taken from him (Mt 13:12).  If you are wise, instruct the ignorant and receive the wisdom of those who are wiser than you are.  If you are a fool, consider a new career path.