To be fair, if you believe that your theological beliefs are taught in the Bible, then you would believe they are inspired by the Holy Spirit--through inspiration of the biblical text, not through teaching of theologians.
yes, all of the reputable Theologies come from the Bible, and all of us claim it as the source of our teachings....
And, no, not all teachings are equal. Either Calvinism is true or it isn't. Either Arminianism is true or it isn't. If it isn't true, it's not equal to the truth. The problem is that we are imperfect humans, so it is difficult to take an overly dogmatic position. My personal view is Calvinistic (the "jury is still out" on "L" in TULIP for me), but I readily admit that I could be wrong on this issue.
Areed.. For myself, believe in the 4 points of TULIP, just having hang ups with doctrine of "limited atonement"...
Think thast there can be doctrines that can be taught/held that would be CLOSER to the truth revealed in the Bible, but that all of us are "seeing through a glass, as if dimly"...
In the essentials, think all of us would agree, but the trouble than occurs when we break down further the concept involved...
Example... ALL believe in a Second Coming, just split off into just when/how that will happen...
For instance...consider the views of the Reformers on the Lord's Supper/Eucharist/Communion. If Calvin was correct, then Luther was wrong. If Luther was correct, then Calvin was wrong. These views are not equal.