'Careful' in the Bible

And Jesus answered and said unto her, Martha, Martha, thou art careful and troubled about many things:

Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.

But I rejoiced in the Lord greatly, that now at the last your care of me hath flourished again; wherein ye were also careful, but ye lacked opportunity.

This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men.