For a seed to flourish it must have the proper balance of pH, nutrients, water and sun. Every seed has the potential for what it is intended, but the condition of the soil will determine if it attains the goal.
God says our hearts are similar. His word is planted in us, but the "kind" of soil will determine if it bears His fruit. As we look at the parable of the sower, my prayer is that we each conduct an honest evaluation of our soil type and then respond in a God honoring way.