'Concerned' in the Bible

For I decided to be concerned about nothing among you except Jesus Christ, and him crucified.

And I want you to be free from concern. An unmarried man is concerned about the things of the Lord, how to please the Lord.

But a married man is concerned about the things of the world, how to please his wife,

and he is divided. An unmarried woman or a virgin is concerned about the things of the Lord, to be holy both in body and spirit. But a married woman is concerned about the things of the world, how to please her husband.

For it is written in the law of Moses, "Do not muzzle an ox while it is treading out the grain." God is not concerned here about oxen, is he?