If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties. — Francis Bacon (quoted from this book (Amazon) by Robert Bowman and Dr. Ken Boa.)
I have in the past spent much time contemplating the central idea of this quote. My contemplations were aroused after listening to some lectures a few years ago by Andrew Fellows at L’Abri in the UK. I think it really does sum up modern Western cultural thinking regarding morality and ethics.