In today's first reading from Acts 18, we meet Apollos. He was "an eloquent speaker" and "an authority on the Scriptures." But he wasn't fully informed on the faith.
Because Apollos only knew of the baptism of John, Priscilla and Aquila "took him aside and explained to him the Way of God more accurately." They wanted to make sure that this great preacher taught the fullness of the faith, so they, in charity to others, corrected his error.
We must be willing to do the same. There are many out there preaching error. If we catch wind of it, it is important for us to correct it - to speak the truth. Not to chastise the person or for our own benefit, but for those who may be led astray. It is truly an act of charity to speak the truth.
Father, help us to have the boldness to correct error when we find it, and to speak the truth always. Amen.