What there isn't, in scripture, is a place where you have a conclusive reason to assume that no decision you can make on earth will affect your "eternal fate" *(which was SO NOT THE POINT of the Christ)
God gave a life for a reason. Every life has a reason. God didn't put men on earth who would not be the elect, just so Calvin could sit on a stump and preach he's higher and mightier.
The life has to be lived.
In that life you have decisions you have to make.
Whether GOD MADE THE SAVED and the unsaved deliberately or not, whoever is INSIDE THE LIFE still has to live it.
So, ALL a heavy calvinist does, is get smug, there is no redeeming value to it at all. (this is in general, I don't know you or if it applies to you.)
It's a conversation that does nothing but create factions and divisions, and Paul shows that to be an act of the flesh, not the spirit.