From the so-called Athanasian Creed:
33. Equal to the Father as touching His Godhead, and inferior to the Father as touching His manhood.
I do not post this to say that it's right, but merely to say that Trinitarian theology thinks it has dal with the "The Father is greater than I," saying.
“One of the symbols of the Faith approved by the Church and given a place in her liturgy, is a short, clear exposition of the doctrines of the Trinity and the Incarnation, with a passing reference to several other dogmas.”
Sound like doublespeak. Both hot and cold, both square and round, up and down.