Are all forms of religious faith indicative of insanity? (My counter example.)

[Thumpalumpacus]

For me, the key lies in understanding the tension between emotion and reason, and understanding that they are two ways of looking at the world and processing experiences which happen to be complimentary, not confrontational. Reason is useful for some decisions or processes, less so for others, and the same is true of emotion.

Using the right tool for the job is pretty important. I don't want to use reason when I'm assessing some things, like how to comfort a grieving widow. By the same token, I don't want to turn to emotionalism when doing things like repairing my truck. Each sensibility has its place in human cognition.

A favorite band of mine, Rush, recorded a song about this tug-of-war between the Apollonian and the Dionysian quite a while back, which sums up the point neatly:

We can walk our road together
If our goals are all the same.
We can run alone and free
If we pursue a different aim.
Let the truth of love be lighted,
Let the love of truth shine clear.
Sensibility, armed with sense and liberty,
With the Heart and Mind united in a single perfect Sphere.

I agree with you that tolerance of differing views is one measure of reasonability. But I don't think "reasonability" in this case comports precisely to using the faculty of reason. I think in this context it means being sensible in order to get along with others.

I'm always suspicious of binary thinking, too.