It wasn't consistent at all. That's why the Council was called and all the previous bibles destroyed. Doctrine, and even dogma, varied from one region to the next. Nicea had to settle whether Jesus was the Son o' God. And by a majority (but not unanimity) on a ballot, the Council decided he was. Prior to that, three centuries of speculations were all over the place.
So Jillian's absolutely correct, Nicea was all about establishing political control -- politics and religion being two sides of the same coin in that time.
Do you really think ALMIGHTY GOD would have a problem having only GOD inspired men to choose only GOD INSPIRED (GOD BREATHED) books to be included in His Holyword???? THINK!!!
"Holyword"? Interesting -- at first glance it looked like "Hollywood". And eerily appropriate.
Here's your problem, and it's as old as theism itself: