"In concluding this narrative, I would say that we are living in a most solemn time. In the last vision given me, I was shown the startling fact that but a small portion of those who now profess the truth will be sanctified by it and be saved. Many will get above the simplicity of the work. They will conform to the world, cherish idols, and become spiritually dead. The humble, self-sacrificing followers of Jesus will pass on to perfection, leaving behind the indifferent and lovers of the world. 1T 608.3"
"And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God."
EGW's statement about conforming to the world directly echoes the principle in Romans 12:2.
"Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it."
Both passages discuss the idea that only a small portion of people will be saved.