Contradiction with Proverbs 19:21
Unlike 1 Samuel 20:12, which implies plans being dependent on circumstances, this verse states that the counsel of the Lord will stand regardless of human plans.
Proverbs 19:21: [There are] many devices in a man's heart; nevertheless the counsel of the LORD, that shall stand.
Contradiction with Jeremiah 29:11
Contradicts with the uncertainty in 1 Samuel 20:12, as this verse talks about God having definitive plans for peace and a future.
Jeremiah 29:11: For I know the thoughts that I think toward you, saith the LORD, thoughts of peace, and not of evil, to give you an expected end. [expected...: Heb. end and expectation]
Contradiction with James 4:13-14
Suggests uncertainty in human plans, contrasting with 1 Samuel 20:12 where human plans and actions are assumed to determine outcomes.
James 4:13-14: Go to now, ye that say, To day or to morrow we will go into such a city, and continue there a year, and buy and sell, and get gain:
Contradiction with Isaiah 46:10
This verse says God’s purpose will stand and He will do all His pleasure, which contrasts the dependency on future events seen in 1 Samuel 20:12.
Isaiah 46:10: Declaring the end from the beginning, and from ancient times [the things] that are not [yet] done, saying, My counsel shall stand, and I will do all my pleasure:
Contradiction with Proverbs 16:9
Suggests that it’s the Lord who directs steps, a contradiction to the implication in 1 Samuel 20:12 that events may be determined by human efforts and decisions.
Proverbs 16:9: A man's heart deviseth his way: but the LORD directeth his steps.