The doctrine of conditional salvation runs through out the Bible. The wicked can be saved provided they turn from their wickedness. There is no salvation outside of the kingdom and only those who do the will of God may enter the kingdom. Jesus taught that one must do something to be saved. This same teaching holds true today.
Salvation does come by grace, but it is conditional.
God's grace is powerless to save without our cooperation. We must understand that God's grace can be received in vain. God's grace made Paul what he was because he labored and cooperated with it for his own spiritual growth and development. Once there was a young boy of poor circumstances. He had no home and no means of livelihood.