For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope. -Romans 15:4

Some people think it does not matter what doctrines you believe; that it is immaterial what church you attend; that all denominations are alike. Well, I dislike Mrs. Bigotry above almost all people in the world, and I never give her any compliment or praise; but there is another woman I hate equally as much, and that is Mrs. Latitudinarianism-a well-known character, who has made the discovery that all of us are alike. Now, I believe that a man may be saved in any church. Some have been saved in the Church of Rome-a few blessed men whose names I could mention here. I know, blessed be God, what multitudes are saved in the Church of England; she has a host of pious, praying men in her midst. I think that all sections of Protestant Christians have a remnant according to the election of grace; and they had need to have, some of them, a little salt, for otherwise they would go to corruption. But when I say that, do you imagine that I think them all on a level? Are they all alike truthful? One sect says infant baptism is right; another says it is wrong; yet you say they are both right. I cannot see that. One teaches we are saved by free grace; another says that we are not, but are saved by free will; and yet you believe they are both right. I do not understand that.

Never say it doesn’t matter. Whatever God has put here is of eminent importance; He would not have written a thing that was indifferent. Whatever is here is of some value; therefore, search all questions, try all by the Word of God…  Search and see; but don’t say, “it does not matter.” If God says a thing, it always must be of importance. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0015.cfm