Woe unto you, scribes and Pharisees, hypocrites! for ye pay tithe of mint and anise and cummin, and have omitted the weightier matters of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone. (Matthew 23:23)
An appeal to the Greek shows that the terminal phrase indicates that if there was a conflict, it was the less important matters that should be omitted, not the most important matters. This is a common sense and extremely important principle, yet no English translation I've found has it rendered correctly.
Suppose there was a conflict between two instructions from God, and people were led to believe that all instructions from God are of equal resolution and equal importance. In this case, all people would fail to keep the most important principles, because they would not be willing to leave the lesser principles undone. And they would wonder why it is so difficult to keep the greater principles, when they do such a good job on the lesser ones.
You'd be shocked to see how many such errors exist or to ponder the aggregate effects.