Faith must have a platform to jump off of. It jumps off of the platform of belief. That platform is formed by reason. That is why the gospel must be preached before someone comes to Christ.
Reason needs to be involved before we can have faith or we risk the possibility of being gullible and becoming deceived.
The Bible contains everything we need in order to be able to see clearly the things God wants us to see. In Isaiah God says, “Come now, and let us reason together” Isaiah 1:18 (ASV).
Even God was reasonable. Don’t just swallow everything you are told about God.