I think one of the ultimate proofs that the Protestant doctrine of Sola Scriptura cannot be true is that nowhere in the Bible (especially in the New Testament) does it lay out in any significant detail what a typical Sunday Liturgy should look like.
If you think about it, man’s most important duty is to properly worship God. I underline the word “properly” because if we worship God according to whatever sounds good to us, then it’s not really God we are worshiping, but rather our own tastes, which is a form of idolatry. Some people think that as long as what you do during worship comes straight from the Bible that it’s OK to do, but that is still just taking whatever verses sound good and making up your own liturgy. This is what Protestants are forced into doing, not realizing that nowhere in Scripture are they told to do this. Nowhere in Scripture is the Liturgy laid out as a glorified Bible Study, as we see in most of Evangelicalism. The way we know what Liturgy is supposed to look like is because it came to us from Inspired Apostolic Oral Tradition, and thus the only way a Protestant can avoid falling into man-made liturgy is to reject their central dogma of Sola Scriptura.
Here is a short blog post on this issue if people want to read more about it. I appreciate your thoughts.