Monergism versus Synergism

In Romans 8 there is this,

And we know that in all things God works for the good of those who love him, who have been called according to his purpose. For those God foreknew he also predestined

and

Who will bring any charge against those whom God has chosen?

and also this:

neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord.

That means once we are adopted, we are forever. Nothing, including hypothetically ‘my choice’, can dissolve that bond.