So I have to ask: is the textbook the professor?
Which is why after thirty years as a Lutheran and a decade of study I became a Catholic. The One, Holy, Catholic, and Apostolic Church has taught the same things ever since 33 AD and those things all are in agreement with Scripture. Only the Catholic Church can trace the authority to interpret Scripture back to Christ and the Apostles. The various and sundry spirits folks claim to be relying on can't possibly all be the Holy Spirit and lead to tens of thousands of different denominations. There's even, for example, many an argument over the word "whosoever" in John 3:16 just like there are arguments over "may" or "should" meaning the same thing as "will".
Those who prefer to read the Scripture through the glasses of their own preconceptions with the aid of whatever spirit happens to be hanging around are free to disagree.