The test of men nowadays is divorce. When the woman he loved turns into a determined desperate enemy fixated on doing everything in her power to destroy him. This can wear down a person's mental state.

The test of women is talking neighbors. 

In all these cases Reason does little or nothing to protect one from the evil inclination.

For as Benjamin Franklin wrote making fun of the human condition: "How wonderful it is to be a reasonable person because then you can find reasons to do anything you want."

Or as Kelley Ross [The Kant Fries School] puts it. Be careful when people start talking about reason or as when Spock says "Logic dictates...". Reason does not tell us much.

That is the source of the idea of the Kant Fries school of "immediate non-intuitive knowledge." Or what Rav Nahman calls "faith".