For He says to Moses, "I will have mercy on any man that I choose to have mercy on, and take pity on any man that I choose to take pity on."

So take a look at the goodness and the severity of God; severity to those who have fallen, but goodness to you, on condition that you continue to live by His goodness; otherwise, you too will be pruned away.

And this my covenant I make with them, when I shall take away their sins."

for the gracious gifts and call of God are never taken back.