The cause is pure consciousness atman without form

The cause is pure chit, atman without cause. Pure chit, is oneself, atman, truth of the one who says I am the knower.

If I am the knower, I am the truth, I am of the nature of consciousness. I am all pervasive, which means I do not have a space wise constraint, and in fact I am aware of space.

Space is in me.

In space alone I alone appear to be manifest as various objects, as the knower, I alone shine in the mind, and make the mind shine through sense organs and shine out to cognize the nature of objects. The objects themselves are manifestations of myself, and vrtti also are manifestation of myself.

Consciousness myself alone is manifest as matter also. Matter is nothing but consciousness,  manifest as though consisting of gunas or attributes.

The manifest consciousness with attributes, such as a table, such as wood etc. is a mithya manifestation. Mithya means these attibutes are not intrinsic to atma.

Therefore the only cause for manifestation is really speaking 'unreal' superimposition of attributes, and not a true presence of attributes.

Thus this jagad in its enterity is a superimposition and not a reality.