Luke 15 offers us a striking illustration of how mistaken the Reformed doctrine of total depravity is. In verses 4-6 the Lord Jesus tells the parable of the lost sheep, which concludes with this observation about how things are in the real world:
In the same way, I tell you, there will be more rejoicing in heaven over one sinner repenting than over ninety-nine upright people who have no need of repentance. (Luke 15:7, NJB)
If the Reformed doctrine of total depravity was true then this declaration of The Lord becomes pointless and incoherent, because there would be no ninety-nine upright people. At all. The equivalent statement, if the Reformed were right about this, would be “there will be more rejoicing in heaven over one sinner repenting than over a group of people who do not really exist.” Heck, on the Reformed view we don’t even get the one repentant sinner!