You think? Isn't this such important matter that we should know for sure?
Imagine that you're in a machine. You're told the machine will kill you in some terrible way sometime in the future. You don't know when or how. But you're also told that "If you believe in the knob turning, you will be saved." Now, you see some knobs, you turn them, and nothing happens. You don't know if you're saved for sure because you still could be killed some time in the future. So you guess that perhaps the weird phrase "believe in" means something more than just turning the knobs, so you start thinking and believing really hard in the knobs and that you imagine yourself turning them, and then turn them, and still nothing happens. So... isn't it important to know exactly what the phrase means so we can be sure that we're doing the right thing to be saved?