Well, that was a lot in there to tease out, Thank you Loolalooh!
I want to focus on Matthew 5:20, Basically Christ says that our righteousness must surpass that of the Pharisees. So that means we have to work overtime to be perfect and not miss anything, right? No, I think God's criteria surpasses our outward actions of keeping the law. I think it involves deeper issues, things that are not outwardly observed. It may mean performing the law, by faith, because this pleases the father. Or making sure we are not committing sins of the heart even though we are performing the right actions. Living for Christ is just as much about "thoughts well thought",as much as a "deed well done." Not just checking off things we have to do, like the pharisees. Our righteousness must surpass this.
Psalm 139:1-2
“O Jehovah, you have searched through me, and you know me. You yourself have come to know my sitting down and my rising up. You have considered my thought from far off.
Psalm 26:2
Test me, LORD, and try me, examine my heart and my mind.