Devotion

One does not simply cast a fireball.
In this system of magic, a person gains mana through life experience. The older one becomes, the more mana they will have. To gain the total amount, you must accept your past and the very moment of it. One who has stolen and admits to it, accepting the consequences, will gain more than a man who is ashamed of his son and his trials in life.
Mana, from this point, can be used to cast any spell, but using the same type often enough makes the mana devoted. Meaning the mana can only be used for that type of magic. Gathering enough of one type of devoted mana leads to devotion allowing you to passively gain magical power without using mana. The catch is that a fire Mage is not passionate because of natural skill with fire magic but because the fire magic makes them passionate through their devotion to fire magic. Magic will change how a person acts as they become more powerful with it.
Devotion also makes casting more powerful spells easier. Each devoted point of mana is worth more to the spell you are casting, guiding people to go down one kind of magic more and more. This leads to more problems than good as the devotion slowly starts to drive them into a set mindset. It is recommended that most people pick three different magic to keep most of their identity intact. Still, it isn't uncommon to devote themselves to one another and accept the consequences.

Type

Metaphysical, Arcane