1013:
Please compare the verses that use "before the foundation of the world" and "from (or since) the foundation of the world".
Before the Foundation of the World (Pro Katabole Kosmos)
John 17:24 Father, I will that they also, whom thou hast given me, be with me where I am; that they may behold my glory, which thou hast given me: for thou lovedst me before the foundation of the world.
Eph 1:4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
1 Peter 1:20 Who verily was foreordained before the foundation of the world, but was manifest in these last times for you,
From the Foundation of the World (Apo Katabole Kosmos)
Matt 13:35 That it might be fulfilled which was spoken by the prophet, saying, I will open my mouth in parables; I will utter things which have been kept secret from the foundation of the world.
Matt 25:34 Then shall the King say unto them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world:
Luke 11:50 That the blood of all the prophets, which was shed from the foundation of the world, may be required of this generation;
Heb 4:3 For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
Heb 9:26 For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
Rev 13:8 And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
Rev 17:8 The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
Other "time" passages to notice:
Before the ages of time (Pro chronos aionios)
II Tim 1:9 Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
Titus 1:2 In hope of eternal life, which God, that cannot lie, promised before the world began;
From the Beginning (Ap Arche)
II Thess 2:13 But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:
God Predetermined Before the Ages (Proorisen Theos Apo To Aionios)
I Cor 2:7 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:
Predestinated Us For Adoption (Proorisas Hemas Eis Huiothesian )
Eph 1:5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
1013:
I believe that God had a complete plan before He created the world AND that He is now presently bringing that plan to pass AND that He knows His plan will not fail BECAUSE He knows that He will succeed SINCE He knows that NOTHING can thwart His will or prevent Him from causing all things to occur exactly as He wishes them to occur.
In my opinion, God's certainty of future events is not a result of His foreknowledge of inevitability, (as though our present reality is all past history for God), but RATHER His Foreknowledge is a result of His certainty that He is able to cause whatever He wishes.
And I think you more ore less agree with me.