Know thyself. A maxim as pernicious as it is ugly. Whoever studies himself arrest his own development. A caterpillar who seeks to know himself would never become a butterfly.
Andre GideMost often it happens that one attributes to others only the feelings of which one is capable oneself.
Andre GideNo theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.
Andre Gide