You totally forgot one other option. The only viable option. The Holy Spirit. The CC has no greater access to the Spirit than you or I. I rely in the Holy Spirit’s. I trust Him to guide me. Don’t you?
I’ll give you a real life example in my own life. I used to believe you could lose your salvation. I would hear others speak of assurance but still flatly thought they were wrong. But then through my daily Bible studies, I started getting conflicting feelings on the matter. Scripture seemed to conflict with my beliefs (the Holy Spirit started working on me). So I started praying that God would give me Truth and wisdom in the matter. It took me a couple of years and with the Holy Spirits help, he opened my eyes to the Truth. I was once like most on this forum. How could someone fall into sin and not go to hell.
But then, the Holy Spirit started asking me questions through scripture. If I sealed you until the Day of the Lord, that is a promise. Why would I lie and unseal you? If I selected you before the foundation of the world to be in My Kingdom, what could you ever do to overcome My power/my plan? I tell you over and over again in My Word that I have given you eternal life. Do you think I really lied about that? But it took me another year because of difficult passes like Hebrews 10. So with the Holy Spirit’s guidance, He opened the truth behind those difficult passages and now my faith and trust in Jesus has gone to a whole new level. I now have God’s peace knowing that He will sustain me until I reach Heaven. I have joy knowing that Jesus did more for me than I had thought previously. It is a great feeling to know that God has me in His hands, and no matter how imperfect I am, He loves me and will keep me safe until I see Jesus’ face to face. This is the Gospel and its all Biblical my friend.
God bless you