As you go through life, sometimes painful or disappointing experiences will tempt you to build barricades around your heart. Feelings of inadequacy or unworthiness can become barriers if they cause you to turn your heart away from Heavenly Father. Through disobedience, you can roadblock revelation by hardening your heart.
When there are blockades between your heart and the will of your Heavenly Father, you will have difficulty choosing in accordance with God's will.
But you can, like Nephi, pray that your heart will be softened (see Proverbs 3:5–7), and He will help you to know what your barriers are and how to remove them. Then you'll be without roadblocks on the road to righteous decisions.