Where do you find any solid ground, when sola believers cannot agree among themselves - except when it comes to attacking the "one holy and catholic apostolic church"?
Denominations are the works of man. Read their history - every one goes back to a man.
And Catholics are a denomination. I don’t need to ask another man if the ground I’m standing on is solid or not. I find plenty of solid ground in the Bible.
I noticed in your quote - you did not Capitalize Holy or Catholic - it is understandable to not capitalize catholic as the term (unless you are talking about the RCC) means the congregation - the people