Quote from NoahJD,
"Poonen states that "no where in scripture does it say we are predestined to heaven.""
Romans 8:30 Moreover, whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified.
Romans 8:30 states, "...them he also glorified." The glorified state is no less than Heaven. The past tense, regarding all these things which God has done for the subjects spoken of in the context of these verses(28-39),is used rather than the present tense.
From Robertson's Word Pictures - Glorified (edoxasen). All first aorist active indicatives of common verbs (kaleoÌ„, dikaiooÌ„, doxazoÌ„). But the glorification is stated as already consummated (constative aorists, all of them), though still in the future in the fullest sense. "The step implied in edoxasen is both complete and certain in the Divine counsels” (Sanday and Headlam).
And the promise from Jesus Himself is...
Let not your heart be troubled: ye believe in God, believe also in me. In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you. And if I go and prepare a place for you, I will come again and receive you to myself; that where I am, there ye may be also. John 14:1-3
(Here in John, "...my Father's house..." is no less than Heaven).
And again in different terms,
Fear not, little flock; for it is your Father's good pleasure to give you the kingdom. Luke 12:32
(Here in Luke,"...the Kingdom" is no less than Heaven).
In other terms,it is no less than Heaven which is the saints inheritance -
In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will:
Which is the earnest of our inheritance until the redemption of the purchased possession, to the praise of his glory. The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints. Ephesians 1:11,14,18.
For this ye know, that no lewd, nor unclean person, nor covetous man, who is an idolater, hath any inheritance in the kingdom of Christ and of God. Ephesians 5:5
Giving thanks to the Father, who hath made us meet to be partakers of the inheritance of the saints in light:
Knowing that from the Lord ye will receive the reward of the inheritance: for ye serve the Lord Christ. Colossians 1:12,3:24.
And finally,
Peter, an apostle of Jesus Christ, to the elect sojourners of the dispersion of Pontus, of Galatia, of Cappadocia, of Asia, and of Bithynia, according to the foreknowledge of God the Father, in sanctification of the Spirit to obedience and sprinkling of the blood of Jesus Christ: Grace and peace be multiplied to you. Blessed be the God and Father of our Lord Jesus Christ, He according to His great mercy having regenerated us to a living hope through the resurrection of Jesus Christ from the dead,to an inheritance incorruptible and undefiled and unfading, having been kept in Heaven for you the ones in the power of God being guarded through faith to a salvation ready to be revealed in the last time. 1 Peter 1:1-5
(Note "inheritance" and "Heaven" which are used in verse 4).
Simply stated - NO PREDESTINATION NO SALVATION!
Heaven is full due to predestination.
And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins.
Now all this was done, that it might be fulfilled which was spoken from the Lord by the prophet, saying,
Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us. Matthew 1:21-23