Eternal Joy, Eternal Happiness, Eternal Security

Rom 8:31 What shall we then say to these things? If God be for us, who can be against us?
32 He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?
33 Who shall lay any thing to the charge of God’s elect? It is God that justifieth.
34 Who is he that condemneth? It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us.
35 Who shall separate us from the love of Christ? shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?
36 As it is written, For thy sake we are killed all the day long; we are accounted as sheep for the slaughter.
37 Nay, in all these things we are more than conquerors through him that loved us.
38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

Introduction:
Jude 1:20 But ye, beloved, building up yourselves on your most holy faith, praying in the Holy Ghost,
21 Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ unto eternal life.
22 And of some have compassion, making a difference:
23 And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh.
24 Now unto him that is able to keep you from falling, and to present you faultless before the presence of his glory with exceeding joy,

I. Be sure you have salvation
John 3:15 That whosoever believeth in him should not perish, but have eternal life.
II. What do you believe?
a. You are a sinner
Rom 3:10 As it is written, There is none righteous, no, not one:
b. The only way to get rid of your sin is through Jesus
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father
c. Trusting Jesus alone and not yourself
Eph 2:9 Not of works, lest any man should boast.
Tit 3:5 Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
d. That Jesus is the Son of God
Mt 16:16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.

III. Believe that He will keep you saved forever
Romans 8:38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come,
39 Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

IV. Where are my sins now?
2 Co 5:21 For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.
Micah 7:19 He will turn again, he will have compassion upon us; he will subdue our iniquities; and thou wilt cast all their sins into the depths of the sea.

Conclusion:
Because of all of this we are assured of Heaven when we die
Rev 20:6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.

But whoever does not believe
Rev 20:12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire. This is the second death.
15 And whosoever was not found written in the book of life was cast into the lake of fire.