'Truly' in the Bible

When they had come, they asked him, "Teacher, we know that you are honest, and don't defer to anyone; for you aren't partial to anyone, but truly teach the way of God. Is it lawful to pay taxes to Caesar, or not?

The scribe said to him, "Truly, teacher, you have said well that he is one, and there is none other but he,

But he again denied it. After a little while again those who stood by said to Peter, "You truly are one of them, for you are a Galilean, and your speech shows it."

When the centurion, who stood by opposite him, saw that he cried out like this and breathed his last, he said, "Truly this man was the Son of God!"