In the Bible "heart" is the center of a person, the place of love, but it is also the place of joy and suffering. André Louf (p.48) speaks of this.  Jesus, the "Word of the Father", was "planted into" our hearts at the time of our baptism.   It is the same spirit that stirs us in the Word of God and so moves our heart to receive the Word.  When our heart is cleansed more and more through the Spirit of God - that is important - then new sounds resonate in the heart when it encounters the Word of God.  "When God's Word addresses our heart, both the heart and the Spirit of God recognize each other immediately enabled by the common Spirit that lives in them."  So the heart understands that it has been given a new organ, so to speak, with which to understand the Word in new ways and live from it.  The Word opens the heart more deeply and becomes "food" (Jer. 15:16) for it more and more, a source of power and grace.

- Matthew 13:1-8 (Four types of soil)

• See yourself  symbolically as a type of soil.  Which soil is like your heart?...

• Pray for a heart that is like rich soil - persistent, eager and full of trust...

Ezekiel 36:26 f. (The heart of stone and the heart of flesh)

• Place a stone, about the size of your palm, in your right hand (left hand for the left handed) and feel the contrast in your hand: hard - soft - cold - warm - dead -living etc.  ...

• Hold the stone in your hand, but now direct your attention to the connection that exists between the word of God and your heart.  What conversation might take place here? ...Where has something become hardened ...Is there something in this relationship that has become more alive which beforehand was dead, so to speak, or has something become like stone which before had "inflamed" your heart?...

• Seek the place in yourself from which the quality of this relationship originates - your "heart" . .  how do you feel about this area in you on a scale between feeling "dead" to feeling "alive"?

• Turn your attention again to the stone in your hand and experience how the sensation has changed after first receiving it ...

• Open your "heart" to the living fullness of God - pray that God's life might flow into your heart...and that God might change your stony heart into a living heart of flesh... and linger in such prayer...

Comment:
This suggestion is well suited for a group meditation. The facilitator must have prepared clean stones beforehand to offer the participants.  Moreover, the areas we investigate in ourselves that are like "stone" can vary: our body, where have we become hardened?, our personal relationships how alive are they? and similar things

"Create in me a clean heart, O, God" (a new heart)...