The man who is a pessimist before 48 knows too muc — Mark Twain Next Now and then we had a hope that if we lived and we “ The man who is a pessimist before 48 knows too much; if he is an optimist after it, he knows too little. Old Age and Ageing Wisdom Share Share Report an error Comments (0) Log in to post a comment. No comments yet. Be the first to comment.