The Holy Spirit who is given to work grace in us, He is also given to witness grace unto us and to make us "know the things that are freely given to us of God" (1 Cor. 2:12). He is a free and sovereign agent indeed, and He works and witnesses in them in whom He worketh as He pleases. He giveth assurance of peace with God as much as He pleases and as soon, and no more and no sooner, than He pleases (1 Cor. 12:11).
Our election passively is God's actively. God's eternal purpose [is] to reconcile us. But how should this be made sure unto our hearts without their believing and considering that God has eternal purposes about that matter?