I think it can probably be thought of as a "warmer" kind of knowledge than Intelligence. It is the intelligent black mage that knows the child's dad likely perished in the fire. It is the mindful white mage who knows telling the kid that will not help. Intelligence is cold logic, while mind is more hunches and personal experience. A black mage can tell you how a mage channels the aether through their bodies and focuses them into desired effects, while a white mage is more concerned with applying the end result. It is theory versus practice.