Albert was deeply depressed that his questions had gone unanswered and that he had failed to obtain a signed note from Professor Flitwick for the Restricted Section. He was also somewhat troubled by the professor's remark that the essence of a charm was spellcraft.
What was spellcraft?
It referred to the magical act of mobilizing the magical forces of the wizarding world to achieve certain effects that ordinary people could not attain.
Chapter 164