What is the meaning of infinite soul?

Were your professed scientists only sincere in their desire to arrive at a solution of the difficulties that encompass the investigation—were they to go about it in the same spirit, which they manifest in other matters, the truth, in all its beauty, would soon burst upon them, that all things, everything they are cognisant of—the entire universe of material worlds rolling in space with all the multitudinous hosts of intelligences that inhabit them—the still greater spirit world, the dwelling-place of the immortals—have sprung from the great, ever-present, all-wise Source of all things, our Father God, the Infinite Spirit.

—Hafed, Prince of Persia