'Careful' in the Bible

According to God’s grace that was given to me, I have laid a foundation as a skilled master builder, and another builds on it. But each one must be careful how he builds on it.

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.

But be careful that this right of yours in no way becomes a stumbling block to the weak.

So, whoever thinks he stands must be careful not to fall.

For the one who eats and drinks without careful regard for the body eats and drinks judgment against himself.