For we labor diligently to write, to persuade our children, and also our brethren to believe in Christ and to be reconciled to God; for we know that it is by grace that we are saved, after all we can do.
2 Nephi 25:23 (Book of Mormon, 1830) (HT: Reformed Supermommy). Emphasis added.
Which is like what the Neonomians said, ie., the Gospel is the new law which accepts our obedience to its more possible commands
Sounds like, facientibus quod in se est Deus non denegat gratiam.
There is nothing new under the sun.