Jacob 6

In my mind, Jacob summarizes the Allegory of the Olive Tree for our day with -

"...how merciful is our God unto us, for he remembereth the house of Israel, both roots and branches; and he stretches forth his hands unto them all the day long; and they are a stiffnecked and a gainsaying people; but as many as will not harden their hearts shall be saved in the kingdom of God."  (Book of Mormon | Jacob 6:4)

"O then, my beloved brethren, repent ye, and enter in at the strait gate, and continue in the way which is narrow, until ye shall obtain eternal life.
12 O be wise; what can I say more?..."  (Book of Mormon | Jacob 6:11 - 12)

I note that his first promise to those that do not harden their hearts where His mercy is given are promise to be saved.  The second promise that after doing so and "continue in the way" are promised eternal life or exaltation.