Contradiction with Matthew 6:34
Proverbs 4:13 advises to keep hold of instruction, while Matthew 6:34 suggests not worrying about the future, which could imply not holding onto instructions for future guidance.
Matthew 6:34: Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day [is] the evil thereof.
Contradiction with Ecclesiastes 8:15
Proverbs 4:13 emphasizes adhering to instruction, whereas Ecclesiastes 8:15 advocates for enjoying life, possibly downplaying strict adherence to instruction.
Ecclesiastes 8:15: Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be merry: for that shall abide with him of his labour the days of his life, which God giveth him under the sun.
Contradiction with Matthew 10:19
Proverbs 4:13 stresses holding to instruction, while Matthew 10:19 indicates that one should not prepare or hold onto specific instructions when facing persecution.
Matthew 10:19: But when they deliver you up, take no thought how or what ye shall speak: for it shall be given you in that same hour what ye shall speak.