Using a compass to navigate is about discovering new horizons, new lands with new lenses. Using a map to navigate is about following what our predecessors have drawn. What if the map is wrong? How to be sure that the map reflects the true reality? Maps represent a given perception. Compass is for open-minded and critical explorations. The one who gets used to follow maps risks to loose open-mindedness and critical sense, but the one who gets used to use a compass become open-minded and critical. He can build a map. Compass is for looking, seeing, observing, reading, thinking, reasoning from the starting point “I don’t know”. As Socrates has said: “All I know is that I know nothing”. Rather prefer not knowing but knowing how to know than knowing something wrong and believing it is right.