Nope, they don’t declare their own salvation. It’s promised in scripture.
"Most assuredly, I say to you, he who hears My word and believes in Him who sent Me has everlasting life, and shall not come into judgment, but has passed from death into life." (John 5:24)
Hebrews 10:10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all. 11 And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins: 12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; 13 From henceforth expecting till his enemies be made his footstool. 14 For by one offering he hath perfected for ever them that are sanctified. 1 Corinthians 6:11 And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.
Hebrews 10:14 For by one offering he hath perfected for ever them that are sanctified.
The means by which we are saved is an unwavering faith in Jesus.
John 6:38-40 Jesus said, “I have come down from heaven not to do my will but to do the will of him who sent me. And this is the will of him who sent me, that I shall lose none of all that he has given me, but raise them up at the last day. For my Father’s will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise him up at the last day”
Rom. 3:28-30, "For we maintain that a man is justified by faith apart from works of the Law. 29 Or is God the God of Jews only? Is He not the God of Gentiles also? Yes, of Gentiles also, 30 since indeed God who will justify the circumcised by faith and the uncircumcised through faith is one."
When I read John 10:27-30 "My sheep hear my voice, and I know them, and they follow me: And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand. I and my Father are one." for the very first time in my life, I didn't even need another person to explain it to me. A light went on, is all I know how to call it and I KNEW it was the truth. Right then and there I said to God that I believed him and I was his sheep. There was NO YOPIOS at all, just the simple truth of God's word, the words of Jesus recorded in Scripture, and I could see.
It is so sad to read what some say here and to know that for some the simplicity that is in Christ is too simple to understand. It seems weird to read those words, too simple to understand, but there can't be another reason why it is missed. It is human nature to expect something so grand, so enormously important, to cost dearly and to presume that we must be perfect humans to merit it. For it to be a matter of simple faith seems impossible. Yet that is how God works. Where sin abounded grace abounded more. Where mankind rejects something for nothing, God insist acceptance IS enough. Where man refuses to admit he does not and cannot earn eternal life, God hold out his hands and says, "Take it. Taste and see that the Lord is good. It is by grace through faith and that NOT of yourselves. It the gift of God. Not of works."
It is no wonder that Jesus said, "Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven." Kids ran with opened arms and opened hearts into his arms. We should do the same. As we celebrate the truth that he humbled himself and came into our world as a little newborn baby, I pray that we also humble ourselves and reach for him just as those babes of long ago. He is trustworthy. He is LORD GOD ALMIGHTY with us. I hope you and your family have a wonderful Christmas and may we never lose the awe of children for what he has done for us.
What is promised in Scripture is that Christians will pass the Judgement.
Going back to the Lexicon, one discovers that the meaning is actually tribunal; by implication, justice (especially, divine law) -- accusation, condemnation, damnation, judgment.
Now, how do you know that you are actually Christian? You do not profess traditional or primitive Christianity. Are you declaring that you are Christian regardless of what our Lord will Judge? The meaning of all this is that Jesus is the Judge, not you. He is saying that if you comply with His Commands, you will be saved; that includes belief and all that He has Commanded.
John 15: 9 As the Father loves me, so I also love you. Remain in my love.f 10If you keep my commandments, you will remain in my love, just as I have kept my Father’s commandments and remain in his love.g
11“I have told you this so that my joy may be in you and your joy may be complete.h 12This is my commandment: love one another as I love you.i 13* No one has greater love than this,j to lay down one’s life for one’s friends. 14You are my friends if you do what I command you.
If you do not do as He Commands, you are not His friend. You will be cast into the outer darkness.