Is belief in God through natural revelation enough to be saved?
Can people be saved through natural revelation? Natural revelation is God revealing himself through the natural order or through conscience. The Bible is very clear that belief or faith in Christ is necessary for salvation. In John 14:6 Jesus says, “I am the way, the truth, and the life. No one comes to the Father except through me.” Acts 4:12 says that there's only one name that we can be saved through. John 3:16: “For God so loved the world that He gave His Son that whoever believes in him should not perish but have eternal life.” Then skip down to 18, and it says that those who didn't believe are condemned already. It seems just from reading the New Testament that faith in Christ is necessary for salvation.
What about just belief in God? Well, we read that even the demons believe and shudder. Mere belief doesn't seem to be sufficient for salvation. In fact, Acts 10 says Cornelius was a God-fearing man. He believed in God. When you read the passage in context, you can see that wasn’t enough to save him. In fact, Peter was sent to Cornelius to reveal who Christ was so that he could be saved.
Natural revelation can be used to lead someone to the gospel of Jesus Christ and to salvation. We use arguments like the cosmological argument or the teleological argument where God has revealed Himself through nature to point to His existence, but that's not enough.
Biblical faith has three aspects. There's the object. The object of our faith is Jesus Christ. There’s the content or belief. The belief is that he died for our sins and rose again. Finally, there's the commitment. There's the active trust. It's not just a mere belief in God. There is an active trust in Jesus Christ. You can think of it as stepping on an airplane. The object of our faith is the airplane. The content or the belief is that it will take us from one destination to another. But that's not enough. There's the active trust where you step onto the airplane, and it's the same with faith in Christ. All three aspects are necessary, so just some general belief in God through natural revelation isn't enough.