I was just wandering around and thinking about morals, when I came up with this sentence:
Why should I take someone as an authority over truth?
And then I realized that I generally see "authority" being paired with "on" rather than with "over", specially when we talk about how someone is an authority on Physics or Mathematics.
But at the same time I thought of how authority can also mean the right to rule over something, like a kindgom, or to rule over truth, in this case. I decided to do a quick Google search, and found this:
Luke 10:19 (New Living Translation) Look, I have given you authority over all the power of the enemy, and you can walk among snakes and scorpions and crush them. Nothing will injure you.
Out of the dozens of Bible translations, this was the only one that preferred to pair "authority" with "over" rather than "on" or "upon". Is this incorrect or just unused? Which of those should I use?