Are we all called saints?

Yes, in the broad sense, which is why the Catholic Church refers to the Communion of Saints which includes those Christians on earth and in Purgatory. But the Saints that have been canonized are simply those men and women whose holiness sets an example for all Christians to follow. They are people especially recognized by the Church as role models for us to emulate and as friends we can turn to for prayer.

The secular world rightly honors its heroes -- the brave soldiers, the brilliant scientists, the artists, etc. --- and it even makes up pretend heroes with the Batmans and Supermans found in comic books. For Catholics, the hero is a man of virtue, and the heroine is the woman whose dedication to Christ makes her truly worthy of respect.

You are not alone, my fellow Christian! Even if you feel as though you are the loneliest person on earth, God's Saints, our brothers and sisters in Christ, want to pray for you! And their prayers are more efficacious than the prayers of most of our Christian brothers and sisters in this realm because those in Heaven have been purified and stand in the very Presence of God. Nothing unclean enters Heaven (Revelation 21:27)! Those who are there are fully partaking in the divine nature:

2 Peter 1:4

Whereby are given unto us exceeding great and precious promises: that by these ye might be partakers of the divine nature, having escaped the corruption that is in the world through lust.

Paul said in Romans chapter one that we are called to be saints. He was speaking to those who are living when he called those he wrote to saints. I believe that people who are true Christians are God's saints. You are very right about the doctrine of once saved always saved being wrong. If God cannot help us to live above sin, then the Sacrifice of Christ on Calvary is worthless to us. God sent Jesus so that we can live a life pleasing to Him and sin is not pleasing to God. I believe that a person who is living above sin, (and I know many who are,) is a saint. Hope that helps!

Protestants deny the intervention of the saints in heaven because that idea circumvents the help coming directly from Jesus Christ our Savior, our Intercessor, and our High Priest.

The angels are said to obey the voice of God's Word.. well who gives voice to God's Word? Those believers on earth do.

There are a number of Protestants who realize that "once saved always saved" comes from debates with the Calvinism doctrine which focuses on God's sovereignty rather than man's free will. It is only in man's free will that a person saved can remain saved. As the scripture states in many places.. an example is: Colossians 2:5-6; 1:23.

The angels and demons are in a class subordinate to God our Father, and to the name of Jesus and the Word of God as also are all believers to submit themselves to.

It is a theological mistake to simply assume that the saints in heaven can be appealed to directly for intervention.. as it's also a mistake to think that angels or demons can be appealed to directly for their intervention.

There are scriptures in the book of Revelation particularly that mention the prayers of the saints, referring to those saints in heaven. But in no way can it be assumed that those prayers are in response to anyone praying to them on the earth for their intervention.

As all believers on the earth are now to respond to God's promptings and motive of compassion to pray for anyone else (anyone asking a believer on earth to pray for them is the only case of what is allowed).. so the saints in heaven only respond to God's direct directions to pray.

The answer to the short question is no. Jesus will sort His sheep from the goats. (Note: At this period goats and sheep were very difficult to tell the difference). We are told not to judge and if a miracle happens in my presence I tell that person to give God the glory not me

Look below

Jesus said, no one goes to the father except thru him

He is the only mediator between Jehovah God and men.