"predestined," "foreknew," and "called"

My take on these words 

Romans 8.28-30 speaks of the Divine purpose and destiny of God's people to be conformed to the image of the son of God which involves and by means of our sharing in the sufferings with creation (that would include persecutions).

I believe these 3 words speak of God's predetermined purpose for his people, though "called" (Greek Kaleo) could speak of invitation as through the gospel, it could mean “named”:  those whom he foreknew as children of God, he predestined to be conformed to the image of the Son, and these he named children of God, and these he justified and glorified.

God "foreknew" a people for his purpose ( cp."God has not cast away His people whom He foreknew." Romans 11:2).

That purpose is being conformed to the image of the son. 

Believers were, according to his plan, to be holy and without blame.  This is their calling (Greek Klesis or Kletos) , vocation.  "Us who believe" (Eph 1 :19) are called to holiness and we are called "saints."

"1 Peter 1:15

but as He who called you is holy, you also be holy in all your conduct, because it is written, “Be holy, for I am holy.”

"Ephesians 1:4

just as He chose us in Him before the foundation of the world, that we should be holy and without blame before Him in love."

Eph 1:18-19

"that you may know what is the hope of His calling (Klesis), what are the riches of the glory of His inheritance in the saints,   and what is the exceeding greatness of His power toward *us who believe."