Unity - of God

There is also the divine unity or entity which is sanctified above all concept of humanity. It cannot be comprehended nor conceived because it is infinite reality and cannot become finite. Human minds are incapable of surrounding that reality because all thoughts and conceptions of it are finite, intellectual creations and not the reality of divine being which alone knows itself. For example, if we form a conception of divinity as a living, almighty, self-subsisting, eternal being, this is only a concept apprehended by a human intellectual reality. It would not be the outward, visible reality which is beyond the power of human mind to conceive or encompass. We ourselves have an external, visible entity but even our concept of it is the product of our own brain and limited comprehension. The reality of divinity is sanctified above this degree of knowing and realization. It has ever been hidden and secluded in its own holiness and sanctity above our comprehending. Although it transcends our realization, its lights, bestowals, traces and virtues have become manifest in the realities of the prophets, even as the sun becomes resplendent in various mirrors. These holy realities are as reflectors, and the reality of divinity is as the sun which although it is reflected from the mirrors, and its  virtues and perfections become resplendent therein, does not stoop from its own station of majesty and glory and seek abode in the mirrors; it remains in its heaven of sanctity. At most it is this, that its lights become manifest and evident in its mirrors or manifestations. Therefore its bounty proceeding from them is one bounty but the recipients of that bounty are many. This is the unity of God; this is oneness; -- unity of divinity, holy above ascent or descent, embodiment, comprehension or idealization; -- divine unity. The prophets are its mirrors; its lights are revealed through them; its virtues become resplendent in them, but the Sun of Reality never descends from its own highest point and station. This is unity, oneness, sanctity; this is glorification whereby we praise and adore God.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 259