Prophecy is not necessarily dependant on predestination, there are instances in the Bible where a prophecy is not fulfilled because certain conditions were not met. If God never deviates from his plan, why bother to pray? Unless man is a puppet created to play the part God has predestined for him. Which makes God responsible for evil. Adam and Eve tried to put the blame on each other and eventually the snake, but God still kept them responsible.
Lastly God indeed offers salvation by grace alone. We cannot earn grace by good works. Still everyone must personally accept God's offer of salvation. Joshua 24:15: "...choose you this day whom ye will serve; ... but as for me and my house, we will serve the LORD." I read no coercion here.
Give me examples of where PROPHECY was not fulfilled when it should have been. We bother to pray to please God.
All that we say, think, and do is predestined from the beginning. God's plan is finished; it is merely playing out through time, but in eternity, according to God's perception, it is finished. The puppet criticism of election doesn't wash because God did give us a will, but it is against God. Because He is God, how can He not know all things? How can He not be in control of all things? If you do not believe He is in control, then you are denying His power and saying that man's will is stronger.
Isaiah 45:7 says
"I make peace and create evil. I the Lord do these things." According to
Revelation 13:8, it was predestined man would sin because it was predestined that the
Lamb was slain from the foundation of the world. He was slain for our sins before we were even created.
We are not saved by grace alone. According to
Ephesians 2:8-9 - "8 For
by grace are ye saved through faith; and that not of yourselves: it is the gift of God: 9 Not of works, lest any man should boast." Let those verses tell it. I need not interpret them.
As for choosing this day...
Joshua 24:15, yes, God tells us to choose this or that thing and if we go against God there are consequences. If we do what God says, there is reward. We do God's will according to God's plan, not ours. "A man's heart deviseth his way,
but the Lord directeth his steps."
Romans 7:18 - "For I know that in me (that is, in my flesh,) dwelleth no good thing:
for to will is present with me; but how to perform that which is good I find not." Our will is no good.
Romans 9:18-20a - "18 Therefore hath he mercy on whom he will
have mercy,
and whom he will he hardeneth. 19 Thou wilt say then unto me,
Why doth he yet find fault? For who hath resisted his will? 20
Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus?"
God is in control of all things, like the potter over his clay.
Romans 9:20b-24 - "Shall the thing formed say to him that formed
it, Why hast thou made me thus?
21 Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour? 22
What if God, willing to shew
his wrath, and to make his power known, endured with much longsuffering the
vessels of wrath fitted to destruction: 23 And that he might make known the riches of his glory on the
vessels of mercy, which he had afore prepared unto glory, 24 Even us, whom he hath called, not of the Jews only, but also of the Gentiles?"
Romans 8:28-33 - "28 And we know that all things work together for good to them that love God,
to them who are the called according to his purpose.
29
For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren. 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.
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."
No interpretation needed. Either one believes these verses or one doesn't.