Re: Rabbi Gilles Bernheim
Jacob Bronowski spoke out against the conceit of "absolute knowledge" in "The Ascent of Man." And as far as it goes, he was right.
But one has to be careful not to fall off the other side of the horse. There are plenty of certainties in human existence--the difference between life and death being only the most obvious.
The silliest phrase I have ever heard from a moral relativist is "There are no absolutes."
Again: someone who is trying to deconstruct the entire concept of morality for you does not have your best interests in mind.