Even as a TBM this verse always bothered me from the BoM:
2 Nephi 25:23
23 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.
The phrase "after all we can do" implies that it is basically impossible to achieve grace, therefore
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