The three core planes

Everything that exists is built from three core planes:

The Physical — all matter in any state, and the laws of physics. It gives substance and permanence.
The Spiritual — souls, and a state of energy called essence. It gives will: the power to enforce intent.
The Mind — anything that thinks exists here. It gives reason: the ability to imagine something and intend to act on it.

No reality exists without all three.

The core planes are not places you can travel to. They are like the three axes of space: dimensions that run through everything.

Free will

A being with free will exists on all three core planes at once. Being on all three is required for free will but does not guarantee it. Something can respond to conditions — even choose, like a lock opening only for the right key — without having free will.

Ignorance lets free will matter. If you knew exactly what was best and worst for you in every case, your choices would do no work. Not knowing is what gives free will something to do.

FROM
THE
CANON