'Indeed' in the Bible

I indeed am baptizing you in water on a profession of repentance; but He who is coming after me is mightier than I: His sandals I am not worthy to carry for a moment; He will baptize you in the Holy Spirit and in fire.

and the men on board fell down before him and said, "You are indeed God's Son."

"Elijah was indeed to come," He replied, "and would reform everything.

The Son of Man is indeed going as is written concerning Him; but alas for that man by whom the Son of Man is betrayed! It had been a happy thing for that man if he had never been born."