Intellect makes the physical world

"Miracles are thought-creations. Thought can create lower-order or higher-order realities. This is the basic distinction between intellectualization and thinking. One creates the physical, and the other the spiritual, and we believe in what we create."

Intellect here is being basically equate with the ego thought system. Intellect is a device that separates and analyzes. It looks at things and separates them off and compares them. It judges them and evaluates them. This splitting apart is an emphasis on separation and increases the send of fragmentation of things. Things can become extremely complicated in the intellect.

As such, since the physical world is made from the idea of separation and the intellect similarly fosters perceptions of separation, the intellect can be said to be responsible for making the world. ie the ego mind of separation reinforces ideas of differences and contrasts and directly leads to physical matter showing up.

Jesus congrats this against real thinking, ie the thoughts you think with God, thoughts of love and creation, which are extensions of God's mind. Those create wholeness and spirit and eternal life because they are not based on separation. It's a way of thinking that doesn't dissect or analyse or judge or evaluate. It's a thought process that looks out from a loving whole state of mind and creates more of the same - the good, the beautiful and the holy. This extends the Kingdom of God (heaven).

"Child of God, you were created to create the good, the beautiful, and the holy. Do not lose sight of this."

You might notice also that when you move away from love and the present moment, the mind creates a sense of separateness from "what is" and moves into a kind of more fictional, theoretical, conceptualizing state. This produce a sort of "shift upwards" in the mind, or what we might call moving thought up into the intellect. In the intellect everything becomes theoretical and non-practical, or is a lack of application because it's a lack of real engagement and sharing. It could be thought of as a way of shutting down and separating off by trying to hide from immediate reality, going into fantasies and sidetracks.

"Intellect may be a "displacement upward"

The intellect can be somewhat useful perhaps for assessing things in this world and sorting out what to do and so on, but only as a temporary tool. It's easy to become lost in it and to be so involved in intellectualizing that your whole experiences becomes one big theory and not a whole lot of relationship. Then you can be sort of living in a cloud of "course thought" masquerading as "doing the course" but only really being good at talking bout it, around it, and indirectly referring to it. The truth has to be lived, and that means eventually the intellect will be transcended and used no more.