'Certain' in the Bible

And to the angel of the church in Laodicea say: These things says the true and certain witness, the head of God's new order:

And the heaven was open; and I saw a white horse, and he who was seated on it was named Certain and True; and he is judging and making war in righteousness.

And he who is seated on the high seat said, See, I make all things new. And he said, Put it in the book; for these words are certain and true.

And he said to me, These words are certain and true: and the Lord, the God of the spirits of the prophets, sent his angel to make clear to his servants the things which are now to come about.