'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.

For he accepted our urging and, being very diligent, went out to you by his own choice.

And we have sent with them our brother, whom we have oftentimes proved diligent in many things, but now much more diligent, upon the great confidence which I have in you.