The proper study of mankind is man. How, then, can philosophers be objective?
This is a question I ask myself every time I think of philosophical questions. We have no choice but to view the world and its mysteries from a human perspective, but that may be one that is quite irrelevant or mistaken from some other hypothetical perspective. It may be a question to which there's no answer, but it does seem to point to a fundemantal flaw in all philosophical inquiry.