'Confidently' in the Bible

“Brothers, I can confidently speak to you about the patriarch David: He is both dead and buried, and his tomb is with us to this day.

However, Barnabas took him and brought him to the apostles, and described to them how Saul had seen the Lord on the road [to Damascus], and how He had spoken to him, and how at Damascus Saul had preached openly and spoken confidently in the name of Jesus.

He was talking and arguing with the Hellenists (Greek-speaking Jews); but they were attempting to kill him.

and they said unto her, 'Thou art mad;' and she was confidently affirming it to be so, and they said, 'It is his messenger;'

And when he had seen the vision, we (including Luke) tried to go on into Macedonia at once, concluding that God had called us to preach the gospel to them.

When the governor gestured for him to speak, Paul replied, "Because I know that you have been a judge over this nation for many years, I confidently make my defense.

Which hope [of the Messiah and the resurrection] our twelve tribes [confidently] expect to realize as they serve and worship God in earnest night and day. And for this hope, O King, I am being accused by Jews!