'Concern' in the Bible

But I want you to be free from concern. One who is unmarried is concerned about the things of the Lord, how he may please the Lord;

Apart from such external things, there is the daily pressure on me of concern for all the churches.

Who is weak without my being weak? Who is led into sin without my intense concern?

But I rejoiced in the Lord greatly, that now at last you have revived your concern for me; indeed, you were concerned before, but you lacked opportunity.

For I testify for him that he has a deep concern for you and for those who are in Laodicea and Hierapolis.