Just because something seems to make sense doesn’t mean you have all the facts. There’s always something you’re missing. Our understanding is always partial. Our understanding of reason itself is limited.
We can use reason to understand the universe and human nature, but it can take us only so far. There’s a point at which reason breaks down — where it reaches the limits of what the human mind is able to understand.
Use reason, but make sure you’re not using it to justify want you want to be true. When reality refuses to bend to your will, it’s time to adjust to reality.