'Be Careful' in the Bible
Be careful therefore how you listen. For to him who has [spiritual knowledge] will more be given; and from him who does not have [spiritual knowledge], even what he thinks and guesses and supposes that he has will be taken away.
and on the morrow, going forth, taking out two denaries, he gave to the innkeeper, and said to him, Be careful of him, and whatever thou mayest spend more, I, in my coming again, will give back to thee.
Be careful, therefore, that the light that is in you is not darkness.
Then he told them, "Be careful to guard yourselves against every kind of greed, because a person's life doesn't consist of the amount of possessions he has."
Be careful. If your brother sins against you, rebuke him. If he repents, forgive him.
And He said, Be on your guard and be careful that you are not led astray; for many will come in My name [ appropriating to themselves the name Messiah which belongs to Me], saying, I am He! and, The time is at hand! Do not go out after them.
"So be careful, or your hearts will be loaded down with carousing, drunkenness, and cares of this life, and that day will come on you suddenly.