… though the Divine Essence is unseen of the eye, and the
existence of the Deity is intangible, yet conclusive spiritual proofs assert
the existence of that unseen Reality. The Divine Essence as it is in itself is
however beyond all description. For instance, the nature of ether is unknown,
but that it existeth is certain by the effects it produceth, heat, light and
electricity being the waves thereof. By these waves the existence of ether is
thus proven. And as we consider the outpourings of Divine Grace we are assured
of the existence of God. For instance, we observe that the existence of beings
is conditioned upon the coming together of various elements and their
non-existence upon the decomposition of their constituent elements. For
decomposition causeth the dissociation of the various elements. Thus, as we
observe the coming together of elements giveth rise to the existence of beings,
and knowing that beings are infinite, they being the effect, how can the Cause
be finite? (‘Abdu’l-Baha, ’Tablet to August Forel’)