'Careful' in the Bible

But I would have you to be free from cares. He that is unmarried is careful for the things of the Lord, how he may please the Lord:

but he that is married is careful for the things of the world, how he may please his wife,

and is divided.'so also the woman that is unmarried and the virgin is careful for the things of the Lord, that she may be holy both in body and in spirit: but she that is married is careful for the things of the world, how she may please her husband.

Faithful is the saying, and concerning these things I desire that thou affirm confidently, to the end that they who have believed God may be careful to maintain good works. These things are good and profitable unto men: