'Take Heed' in the Bible

“Only pay attention and watch yourselves closely so that you do not forget the things which your eyes have seen and they do not depart from your heart all the days of your life. Make them known to your children and your grandchildren [impressing these things on their mind and penetrating their heart with these truths]—

So be on your guard and watch yourselves, so that you do not forget the covenant of the Lord your God which He has made with you, and make for yourselves a carved or sculpted image in the form of anything which the Lord your God has forbidden you.

Then Moses summoned all Israel and said to them:“Hear, O Israel, the statutes and judgments (legal decisions) which I am speaking today in your hearing, so that you may learn them and observe them carefully.

You shall remember [with thoughtful concern] that you were a slave in the land of Egypt, and that the Lord your God brought you out of there with a mighty hand and by an outstretched arm; therefore the Lord your God has commanded you to observe the Sabbath day.

Beware that your hearts are not deceived, and that you do not turn away [from the Lord] and serve other gods and worship them,

Be careful that you do not neglect the Levite [who serves God] as long as you live in your land.

“Be careful during an outbreak of leprosy, that you diligently observe and do according to all that the Levitical priests teach you; just as I have commanded them, so you shall be careful to do.