Sentence:  From all eternity Jesus Christ existed, and Jesus Christ was with God the Father, the first person of the <WSD>Trinity</WSD>; and Jesus Christ was God the Son, the second person of the <WSD>Trinity</WSD>. 
Meaning of the word marked with <WSD> tags:  In Christian belief, the three persons (personae) of the Godhead: Father, Son and Holy Spirit.