[Natural Law]

"Calvin, Luther and just about every reformer for centuries has observed that Rome usurps (or tries to) the role and intent of the Holy Spirit."

Who or what hurt you to make you so bitter towards Catholics and the Catholic Church?

[Dr. Eckleburg]

Lol. Reading Scripture and knowing my salvation is not of myself but is all of, by and for Jesus Christ alone is not "painful" in the least other than bringing me to my knees in gratitude that God has "saved a wretch like me."

It's the Romanist who is insecure and fearful that he is not good enough to warrant God's love so that he must perform various rituals, cash transactions and empty works to get God's approval.

The Bible does not teach that. The Bible teaches assurance of God's love and His faithfulness to all who call upon Him by the indwelling Holy Spirit.