No culture in human history ever suffered because its people became too reasonable or too desirous of having evidence in defense of their core belief… - Sam Harris

There is no society in human history that ever suffered because its people became too reasonable.

Even when we think we are in the present moment we are in very subtle ways looking over its shoulder anticipating what's coming next. We're always solving a problem. And it's possible to simply drop your problem, if only for a moment, and enjoy whatever is true of your life in the present... This is not a matter of new information or more information. It requires a change in attitude. It requires a change in the attentiveness you pay to your experience in the present moment.

Wherever there are right and wrong answers to important questions, there will be better or worse ways to get those answers, and better or worse ways to put them to use. Take child rearing as an example: How can we keep children free from disease? How can we raise them to be happy and responsible members of society? There are undoubtedly both good and bad answers to questions of this sort, and not all belief systems and cultural practices will be equally suited to bringing the good ones to light. This is not to say that there will always be only one right answer to every question, or a single, best way to reach every specific goal. But given the inescapable specificity of our world, the range of optimal solutions to any problem will generally be quite limited. While there might not be one best food to eat, we cannot eat stones — and any culture that would make stone eating a virtue, or a religious precept, will suffer mightily for want of nourishment (and teeth). It is inevitable, therefore, that some approaches to politics, economics, science, and even spirituality and ethics will be objectively better than their competitors (by any measure of “better” we might wish to adopt), and gradations here will translate into very real differences in human happiness.

Speaking from personal experience, I think that losing the sense of free will has only improved my ethics — by increasing my feelings of compassion and forgiveness, and diminishing my sense of entitlement to the fruits of my own good luck.