In the fifties, Celestin Freinet wrote already “ Don’t try to build independently of underground ideas. One must build with and in life. Excuses are many and often good. The gardener, too, whose beautiful peaches are nevertheless bad, has his human excuses. It is because too many people accept these excuses that the world is heading to where hazard and misguided genius leads it. Teachers, above all, must see clearly and try to ensure that at least a little light of truth breaks through.”