Intelligence determines how well your character learns and reasons. Intelligence is important for wizards because it affects how many spells they can cast, how hard their spells are to resist, and how powerful their spells can be. It is also important for any character who wants to have a strong assortment of skills, however increasing your Intelligence will not grant bonus skill points retroactively.

Sorcerers do not use Intelligence for any of their spellcasting — Charisma is used instead.

An Intelligence lower than 9 means that your character is unable to speak properly!