We live because God created mankind for a purpose.
Isaiah 45:18 For thus saith the LORD that created the heavens; God himself that formed the earth and made it; he hath established it, he created it not in vain, he formed it to be inhabited: I am the LORD; and there is none else.
God’s purpose is to fill the earth with his glory.
Numbers 14:21 But as truly as I live, all the earth shall be filled with the glory of the LORD.
God’s glory will be in the form of men and women raised to the divine nature in whom and with whom God will live forever.
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.
This time is prophesied in Revelation:
Revelation 21:3 And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God.
We die because we disobey God. This is called sin.
1 John 3:4 Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
Ignorance of God’s law is no defence.
The punishment for each and every sin is eternal death.
Ezekiel 18:20 The soul that sinneth, it shall die…
Romans 6:23 For the wages of sin is death…
Our problem began with Adam and Eve.
They disobeyed God in eating of the fruit of the tree of knowledge of good and evil, bringing sin and death upon themselves and their progeny.
Genesis 3:17 And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life; 18 Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field; 19 In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return.
Romans 5:12 Wherefore, as by one man (Adam) sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
All are guilty and are condemned to death.
Romans 3:23 For all have sinned, and come short of the glory of God;
God in his mercy has provided a way of escape from sin and death.
He fathered a Son, Jesus Christ, who lived a sinless life and voluntarily gave it in sacrifice so that sins can be forgiven, and the dead raised to eternal life in the kingdom of God on earth.
Hebrews 10:12 But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God;
Because Jesus had not sinned, he was raised from the dead and given the divine nature.
Acts 2:24 Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
After his resurrection he ascended to heaven, to the right hand of God.
There he awaits the day appointed to return and judge the world, raise the faithful from the dead, and establish the kingdom of God upon the earth.
Acts 17:31 Because he (God) hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead.
To avail ourselves of God’s provision, we must believe (have faith in God’s promises) and obey the gospel (good news) of the kingdom of God preached by Jesus Christ and his apostles.
Mark 16:15 And he said unto them, Go ye into all the world, and preach the gospel to every creature. 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned (condemned).
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins…
Those who obey the gospel will be raised from the dead when Christ returns and be given the divine nature – made equal to the angels.
Luke 20:35 But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage: 36 Neither can they die any more: for they are equal unto the angels; and are the children of God, being the children of the resurrection.
Jesus Christ will reign over the mortal population of the earth for 1000 years. After this there will be a second resurrection and final judgment. Sin and death will be eradicated, and all who live on will possess the divine nature. God will be all in all.
Paul explains what is going to happen:
1 Corinthians 15:20 But now is Christ risen from the dead, and become the firstfruits of them that slept. 21 For since by man came death, by man came also the resurrection of the dead. 22 For as in Adam all die, even so in Christ shall all be made alive. 23 But every man in his own order: Christ the firstfruits; afterward they that are Christ’s at his coming. 24 Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. 25 For he must reign, till he hath put all enemies under his feet. 26 The last enemy that shall be destroyed is death. 27 For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him. 28 And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.
May I suggest that you read:
Your Share in God's Promises: https://www.thisisyourbible.com/library/show/181
I hope this helps