Let us take a close look, constructive criticism or otherwise, in the material presented in this week's lesson study material and respond to the material given.
Here is how this week's study begins:
Though the word Trinity itself doesn’t appear in the Bible, the teaching definitely does. The doctrine of the Trinity, that God is One and composed of three “Persons,” is crucial because it is dealing with who God is, what He is like, how He works, and how He relates to the world. Most important, the deity of Christ is essential to the plan of salvation.
There is, of course, much good in this lesson: it speaks of God saving us from sin, in the person of his Son.
This bit, though: "...God is One and composed of three "Persons"", is a problem. "They" is allowed for the persons of the trinity, under
further reading; yet, they are parts of a divine Being, the Trinity.
The distinctions among God, Christ, and the Holy Spirit found in the Bible must be understood as being the way God is in Himself, however difficult for our fallen minds to grasp. The “eternal heavenly dignitaries-God, and Christ, and the Holy Spirit,” as Ellen G. White calls them (Evangelism, p. 616), are equal but not identical or interchangeable.
This says it well: personal distinctions are "the way God is in himself". That isn't just difficult to grasp, it's not a personal God, is it, God and Christ, both present within by their Spirit? "God, Christ, and the Holy Spirit" are "God...in himself"? Please help me differentiate that from modalism??
It may be meant to be miles from modalism - as is said at the end of the lesson, but it's the language of modalism, or? How the Nicene Creed, with its formless substance of orthodox teaching, avoids modalism is a technicality, in their thinking, perhaps: the "personae" are "centres of consciousness" in that substance, rendering them distinct.
As the Bible reveals the living God, the members of the Godhead have identities much more personal and real than that. God and his Son are spoken of as is the Spirit of God: how significant is the identity of Christ as the Son of God, in the Bible? Is it just his incarnated relationship to his Father or also the very basis of his deity in his pre-existence, as the Pharisees recognised, too, making him equal with God?