If you write your name in the sand at the beach, what happens when a wave comes? It all disappears! But if you write on a rock, it stays forever. Sand is like hearing a teaching and forgetting it right away. The rock is when the teaching enters your heart and stays engraved forever.
The Bible says God's teachings need to be engraved on the heart, not just in the notebook. And how do you engrave it? By repeating, practicing, and obeying! Every time you do what Dad teaches, it's like engraving deeper into the rock of your heart!