Just a question out of curiousity. Why do Protestant sects who adhere to Sola-Scriptura--that is, Bible Only, believe in the doctrine of the Trinity? The Trinity was developed by the Church and is never explicitely explained in the Bible. Sure, it may have been briefly implied in certain instances, but there are not any smoking-gun proof passages in the Bible that support the Trinity as far as I know. Most of the purely Biblical arguments in support of the Trinity seem rather unconvincing and built more on speculation than the actual Bible to be honest. I don't see how you can believe these arguments and believe in the Trinity UNLESS you accepted the authority of the Church and extra-biblical sources--something that most Protestant sects refuse to do.
In a sense, it seems like as time goes on, more and more Protestants are actually trying to return back to the Sacraments, fasts and "traditional Christianity"--yet, they are doing it by trying to isolate the Church from it and desperately trying to form these strange, enourmously implicit arguments to prove that their practice is "rooted in the Bible" by twisting, isolating and using even the most basic, obscure, shortest passage there is in the Bible in ways that you would never think to use that scripture before, in order to support some odd theological practice that is more rooted in speculation and a desire for order than actually in the Bible. Such as the "Daniel Fast"--which is a half-butted attempt at having their own form of the Church's official Lent, to all these weird "spiritual retreat Jesus camp" thingys that seem to be a knockoff of the Church's monastic practices, to belief in the doctrine of the Trinity--which is purely rooted in the Church.
How long till they throw in the towel and just return back to proper Christianity instead of all these desperate attempts to recreate it?