The Mystery of Trinity is to know the Father the begetter, the Son the begotten and the Holy Spirit the one who proceeds, one in three and three in one. They are three in name, in person, in work. In name they are called Father, Son, the Holy Spirit. The Father has a perfect person, perfect face, and perfect form. The Son has a perfect person, perfect face, and perfect form. The Holy Spirit has a perfect person, perfect face, and perfect form. As far as their work is concerned, the Father is begetter, the Son is begotten, the Holy Spirit is the one who proceeds. The Father begets and causes procession, but is neither begotten nor proceeds. The Son is begotten, but neither begets nor proceeds nor causes procession. They are one in nature, in essence, in fullness, in substantiality, in divinity, in heart, in word, in breath. They are called Ab, Wold, and Manfes Qeddus. Ab means "the Father," Wold means "the Son," and Manfes Qeddus means "the Holy Spirit," one who proceeds from the Father. The Father is called Father but not Son or Holy Spirit: the Son is called Son, but not Father or Holy Spirit. The Holy Spirit is called Holy Spirit , but not Father of Son. Selam ena Feker. Ras Tafarra naw Hayl Selasse I.