Rom 8:29 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.
"Whom he did foreknow." In this place the word "foreknow" assumes a particular and explicit meaning. In its wider and more general application it must be regarded as referring not simply to the divine prescience, but more especially to the divine prearrangement. For God to foreknow is, in the strict meaning of the phrase, for God to foreordain. There are no guesses, conjectures, or contingencies with God as to the future. Not only does He know all, but He has fixed, appointed, and ordered "all things after the counsel of his own will." In this view there exists not a creature, and there transpires not an event, which was not as real and palpable to the divine mind from eternity as it is at the present moment. Indeed, it would seem that there were no future with God. An eternal Being, there can be nothing prospective in His looking on all things....
But the word "foreknow," as it occurs in the text, adds to this yet another, a more definite, and, to the saints, a more precious signification. The foreknowledge here spoken of, it will be observed, is limited to a particular class of persons who are said to be "conformed to the image of God's Son...."
Octavius Winslow- Divine Predestination