What the law was powerless to do because it was weakened by the flesh, God did by sending his own Son in the likeness of sinful flesh to be a sin offering. And so he condemned sin in the flesh, in order that the righteous requirement of the law might be fully met in us, who do not live according to the flesh but according to the Spirit.
–Romans 8:3-4 (NIV)–

The Spirit helps us in our weakness.
We do not know what we ought to pray for,
but the Spirit himself intercedes for us through wordless groans. And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people
in accordance with the will of God.
–Romans 8:26-27 (NIV)–

Those God foreknew he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers and sisters. And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified.
–Romans 8:29-30 (NIV)–

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Jack W. Cottrell in Perspectives on Election (B&H, 2006).

Randolph S. Foster, Objections to Calvinism As It Is (Schmul, 1998).

John Wesley, Calvinism Calmly Considered, 2 vols (Schmul, 2002).