'Mindful' in the Bible

Be mindful, therefore, of the height from which you have fallen. Repent at once, and act as you did at first, or else I will surely come and remove your lampstand out of its place--unless you repent.

Be mindful, therefore, of the lessons you have received and heard. Continually lay them to heart, and repent. If, however, you fail to rouse yourself and keep awake, I shall come upon you suddenly like a thief, and you will certainly not know the hour at which I shall come to judge you.

I am coming quickly.' Blessed is he who is mindful of the predictions contained in this book."

But he said to me, “Do not do that. I am a fellow servant with you and your brothers the prophets and with those who heed and remember [the truths contained in] the words of this book. Worship God.”