'Heart' in the Bible

Blessed is he who reads and blessed are those who listen to the words of this prophecy and lay to heart what is written in it; for the time for its fulfillment is now close at hand.

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.

She has freely glorified herself and revelled in luxury; equally freely administer torment to her, and woe. For in her heart she boasts, saying, 'I sit enthroned as Queen: no widow am I: I shall never know sorrow.'