A Baha'i view of the trinity...

"But as to the question of the Trinity, know, O advancer unto God, that in each one of the cycles wherein the Lights have shone forth upon the horizons (i. e., in each prophetic dispensation) and the Forgiving Lord hath revealed Himself on Mount Paran (see Habbakkuk 3:3, etc.) or Mount Sinai, or Mount Seir (see Ezekiel 35), there are necessarily three things:

The Giver of Grace, and the Grace, and the Recipient of the Grace;

the Source of the Effulgence, and the Effulgence, and the Recipient of the Effulgence;

the Illuminator, and the Illumination, and Illuminated.

Look at the Mosaic cycle:

The Lord, and Moses, and the Fire (i.e., the burning bush), the Intermediary;

and [at] the Messianic cycle: The Father, and the Son, and the Holy Ghost the Intermediary;

and in the Islamic cycle: The Lord, the Apostle (or Messenger, Mohammed), and Gabriel (for, as the Mohammedans believe, Gabriel brought the Revelation from God to Mohammed).

Look at the sun and its rays and the heat which results from its rays; the rays and the heat are but two effects of the sun, but inseparable from it; yet the sun is one in its essence, unique in its real identity, single in its attributes, neither is it possible that anything should resemble it. Such is the essence of the Truth concerning the Unity, the real doctrine of Singularity, the undiluted reality as to the (Divine) Sanctity."

~ Abdu'l-Baha, Tablets of Abdu'l-Baha v1, p. 115

"The Father, and the Son, and the Holy Ghost the Intermediary .. "

While the translation is good, I caution that this is a reference to the descent of the spirit at the Baptism of Christ. It describes an event in the station of prophethood, not the ontological relationships in the essential trinity. As for the essential trinity, Bahai theology agrees with the filioque of Western Christianity: the Holy Spirit comes into the world through the Word/logos.

The original is in Arabic, here.

Thanks for your post Sen... ! Maybe Mark Foster could add something to the concept from his glossary?

1. ʾal-Kalimaẗ (الكَلِمَة), with ʾal-kalimāt (الكَلِمَات), as the plural form, is the Word. ʾal-Kalimaẗ ʾAlla̍h or, commonly, al-Kalimat Álláh (الكلمة الله‎) is the Word of God.

The reason I posted the above was to share how the concept of "trinity" is seen in the Writings...