The Word of God
1 Pet 1:22 Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently:
23 Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
You must believe the Word of God to know you are saved. You can't change it, or redefine it, you must believe what it actually says.
First, Jesus died for ALL MEN.
Luke 19:10 For the Son of man is come to seek and to save that which was lost.
Are you lost? Then Jesus came to save you.
Jhn 1:29 The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.
Jesus took away the sin of the world, not just some men.
Jhn 4:42 And said unto the woman, Now we believe, not because of thy saying: for we have heard him ourselves, and know that this is indeed the Christ, the Saviour of the world.
Jesus is the Saviour of the world, not just some men.
Jhn 3:14 And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
15 That whosoever believeth in him should not perish, but have eternal life.
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved.
Jesus also compared himself to the serpent that Moses lifted up in the wilderness. This brass serpent would save "every one" and "any man" who "looked" upon it, not just some men.
Num 21:8 And the LORD said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live.
9 And Moses made a serpent of brass, and put it upon a pole, and it came to pass, that if a serpent had bitten any man, when he beheld the serpent of brass, he lived.
Again, the brass serpent would save every one and any man who looked upon it. No man was excluded from it's saving power.
I could go on and on, but I KNOW Jesus died for ME. That does not make me special, I do not boast of being elect, Jesus died for ALL MEN, and that simply includes me.
Therefore, if I come to Jesus and place my trust in him I can KNOW I have eternal life. My faith is not vain, it is founded on the solid rock, the word of God.
1 Jhn 5:13 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.
I don't have to go online and ask Reformed preachers if I am elect, I KNOW Jesus died for me, the Word of God says so. And Jesus said that he will in no wise cast out any man who comes to him.
Jhn 6:37 All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
I don't have to persevere to know I am saved, I don't have to hold on and hope I endure to the end, I have the solemn promise of Jesus Christ the Son of God that if I came to him (and I did), that he would save me.
I KNOW by the Word of God that I am saved.
And that is a very good thing to KNOW.