Many times this passage has been interpreted to mean that most Christians aren’t truly saved and that only a select few will be truly saved. However, to look at that verse in context reveals a different story.
While it is true that there are those in the church that are not truly “in the church,” Jesus is not referring to them here. He is in fact referring to the idea that there are many ways to reach the path of destruction, yet only one to reach salvation, and that path is through trusting Him with our salvation. When you look at the passages after that, He is pointing to the dangers of false prophets, and how to tell a good tree by its fruit. All of these are in fact applicable to those both within the church and without. However, to assume that Jesus is specifically addressing the church and saying that there are many in the church who will not be saved is reading into the text. All Jesus is saying is what He says again in John 14:6, “I am the way, the truth, and the life. No one comes to the Father except through Me.”