'Diligent' in the Bible

So then, if also I wrote to you, it was not for the sake of him that injured, nor for the sake of him that was injured, but for the sake of our diligent zeal for you being manifested to you before God.

But thanks be to God, who gives the same diligent zeal for you in the heart of Titus.

And we have sent with them our brother whom we have often proved to be of diligent zeal in many things, and now more diligently zealous through the great confidence he has as to you.