'Pay Attention' in the Bible

Because of this, [it is] all the more necessary [that] we pay attention to the [things] we have heard, lest we drift away.

how will we escape [the penalty] if we ignore such a great salvation [the gospel, the new covenant]? For it was spoken at first by the Lord, and it was confirmed to us and proved authentic by those who personally heard [Him speak],

Pay attention, brothers, so that there will not be in any one of you an evil heart of unbelief, [resulting] in falling away from the living God.