Discouragment in Prayer vs Hardness of Heart: If someone is struggling because of the discouragement in their failures in reoccuring sin, therefore finding it hard to pray, is their heart becoming hardened? [Luke 18:1-8, Daniel 10:10-14, Psalm 103:13-14, Hebrews 4:14-16, Revelation 12:12, Matthew 4:11, Luke 4:13, Matthew 26:41].