Contradiction with Ecclesiastes 12:12
This verse advises against excessive devotion to many books, whereas Joshua 1:8 encourages constant meditation on the book of the law.
Ecclesiastes 12:12: And further, by these, my son, be admonished: of making many books [there is] no end; and much study [is] a weariness of the flesh. [study: or, reading]
Contradiction with Matthew 6:34
Here, Jesus tells not to worry about tomorrow and live day by day, contrasting the meticulous meditation and planning implied in Joshua 1:8.
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 Matthew 15:9
This verse suggests that teaching doctrines and commandments of men leads to vain worship, which contrasts with the prescribed adherence to the law in Joshua 1:8.
Matthew 15:9: But in vain they do worship me, teaching [for] doctrines the commandments of men.
Contradiction with Romans 3:20
Paul indicates that no one will be justified by the law, countering the idea in Joshua 1:8 where success is linked to law observance.
Romans 3:20: Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law [is] the knowledge of sin.
Contradiction with Galatians 3:10
This verse states that those who rely on the works of the law are under a curse, conflicting with the blessing promised in Joshua 1:8.
Galatians 3:10: For as many as are of the works of the law are under the curse: for it is written, Cursed [is] every one that continueth not in all things which are written in the book of the law to do them.
Contradiction with 1 Corinthians 8:1
It highlights that knowledge can lead to pride, contradicting Joshua 1:8's encouragement of constant study and meditation on the law to gain wisdom and success.
1 Corinthians 8:1: Now as touching things offered unto idols, we know that we all have knowledge. Knowledge puffeth up, but charity edifieth.