What are you? Rocky ground? The wayside? The thorns? The good soil? Or are we the seed that the Sower sows? Sometimes, just listening to the parable of the sower confuses us because we don't quite know where we fit in. It's a difficult parable to understand and it appears that Our Lord intends it to be so. After all, He says to His disciples:
Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.
When you hear this you must not entertain the notion of different natures, as certain heretics do, who think that some men indeed are of a perishing nature, others of a saving nature, but that some are so constituted that their will leads them to better or worse. But add to the words, To you it is given, if willing and truly worthy.