And for that folly of wanting to know to much and believe too little... the Church was split.
And that folly has been multiplied a thousandfold since.
We discern good from evil, now as ever, but let uncertainty about our understanding distract, disguise and paralyze us to the point that that which we do not understand fully and finally; we deny, displace and invert.
So we discern good from evil, yet we choose evil; and we do this again and again, yet only because we do not know-for-sure everything about the good; only because we cannot swiftly, briefly and completely answer every question that we can ask ourselves on the subject.
And this is being 'rational'?