In Mosiah 13 prophet Abinadi told the people of the sins that they have committed so that it will pierce their hearts and they will turn away from evil.  But the people were " filled with wonder and amazement and with anger" because they hardened their hearts knowing their secret works were revealed.  It is common mistake that when we are found guilty of our wrongs, we sometimes react feeling troubled and upset but it is the plan of God that we turn away from all evil works so that we are not condemned to feel this way on judgement day.  Abinadi also declared that salvation does not come by the law alone but also by atonement of Jesus Christ to take away the sins of His people in verse 8.  The prophet also said the people are quick to sin and slow to remember the Lord their God and that they did not all understand the law after it has been taught and this because of the hardness of their hearts.  Our Heavenly Father knows our thoughts and our intentions so when we ask in sincerity for His forgiveness and a new heart to obey His words, He will answer our prayers as we daily and sincerely seek Him for help.