...there is no real advance in human reason, for what we gain in one direction we lose in another; for all minds start from the same point, and as the time spent in learning what others have thought is so much time lost in learning to think for ourselves, we have more acquired knowledge and less vigor of mind. Our minds like our arms are accustomed to use tools for everything, and to do nothing for themselves.
Jean-Jacques Rousseau, Emile or On Education
progress