Elected not on the basis of foreseen works

"It is of course true that God knows the future, and it is equally true that history unfolds just as God knows it will. Certainly all things happen according to the foreknowledge of God. But, as the Westminster Confession, Chapter III, section ii, so explicitly states, 'Although God knows whatsoever may or can come to pass upon all supposed conditions, yet hath he not decreed any thing because he forsaw it as future.' In very simple language, 'according to' and 'because of'' do not mean the same thing. Consider a railroad schedule. The trains run according to the timetable (or should), but it is not the timetable that determines their progress. The type of engine, the weight of the load, the traffic, the stability of the roadbed, the purpose of the train - all these determine the schedule. Thus the train runs according to the schedule, and if we know the schedule, they run according to our foreknowledge, but not because of it. Similarly with election. The mere fact that God knows ahead of time that a man will trust Christ is not the causal explanation of election. Election does not depend on God's knowledge of the future.
This popular confusion of phrases like 'according to' and 'because of' is also evident in a current interpretation of the Lord's Prayer. Some modern dispensationalist argue that Christians today should not use the Lord's Prayer because it says, 'Forgive us our debts as we forgive our debtors.' Since we are saved by free grace in this age, we ask forgiveness not on the basis of our forgiving others but on the basis of Christ's righteousness. So far so good. But then dispensationalism says that in the millennium people will be saved by works, and will then pray to be forgiven on the basis of their conduct. In opposition to dispensationalism the Bible knows only one way of salvation, the glorious way of the cross. And the Lord's Prayer does not request forgiveness on the basis of our forgiving spirit, but modestly and in a humbling fashion beseeches forgiveness from God in proportion as we forgive others. A little attention to words, to prepositions, would save a person from such absurd and sinful doctrinal error." - Gordon H. Clark, New Heavens, New Earth, Pg. 88 - 89