'Happy' in the Bible

(See, I come as a thief. Happy is he who is watching and keeps his robes, so that he may not go unclothed, and his shame be seen.)

And he said to me, Put in the book, Happy are the guests at the bride-feast of the Lamb. And he said to me, These are the true words of God.

Happy and holy is he who has a part in this first coming: over these the second death has no authority, but they will be priests of God and of Christ, and will be ruling with him a thousand years.