'Careful' in the Bible

According to the grace of God given to me, like a skilled master-builder I laid a foundation, but someone else builds on it. And each one must be careful how he builds.

But be careful that this liberty of yours does not become a hindrance to the weak.

So let the one who thinks he is standing be careful that he does not fall.

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