So, what do you think about the Perseverance of the Saints then? Before he died, Sproul agreed the Perseverance of the Saints is a little Synergistic...
"Perseverance of the Saints" can be understood synergistically, or monergistically.
It is synergistic if it is understood as synonymous with, "we must endure to the end".
It is monergistic if it is understood as I like to think of it, "preservation of the saints".
God preserves us.
God holds us in His hand, and doesn't let go (John 6:28-29).
God ensures that we persevere.
We don't persevere based on our own efforts, but because of God's promise.