But without dwelling on the opinion we might have of these and all other philosophers, let us always consider them as men; and let not the votaries of Aristotle carp if, after having trod through so many centuries in darltness without finding ourselves any further ahead than we were before, we should finally wish to see clearly whar we are doing; or if after having been left to wander like blind men, we should remember that we have eyes with which to try to guide ourselves.