@Halcon
You're absolutely right to note that there is a "subordination" in some sense between the Son and the Father. The real question, as you’ve pinpointed, is: in what way is the Son subordinate—and does it matter for salvation? Classical theology makes an essential distinction:
- Subordination of origin: The Son proceeds eternally from the Father (John 1:14; "begotten not made"). This procession implies a real relation of origin (the Son is ex Patre), but not a subordination in essence. The Father communicates the whole divine essence to the Son, such that the Son is consubstantial (homoousios) with the Father.
- Subordination of essence or will: This would mean that the Son has a lesser or derivative will, power, or nature compared to the Father. That is heresy, historically condemned in Arianism, Subordinationism, and Unitarianism.
Thomas Aquinas clarifies this in the Summa Theologiae:
“The Son is said to be less than the Father in His human nature, but not in His divine nature. For in the divine nature, there is no inequality, because the essence is one and the same.” (ST I, q.42, a.4)
You ask why salvation would be lost if we see the Son as subordinate by will. If the Son is not fully God—equal in power, will, and essence with the Father—then He cannot be the Savior. The Psalmist declares: “None of them can by any means redeem his brother, nor give to God a ransom for him” (Ps. 49:7). If Christ is a creature, even the highest, He is still finite. A finite being cannot offer infinite atonement for the sins of the world. Only God can. St. Gregory of Nazianzus expressed it succinctly:
“That which He has not assumed, He has not healed.” (Ep. 101)
Only true God taking on true humanity brings about the reconciliation of man to God.
If we misunderstand Christ's divine nature, we risk idolatry on one hand (if we worship a creature), or denial of His rightful worship (if we refuse to honor Him equally with the Father). Yet Scripture explicitly shows the Son receiving worship (cf. Hebrews 1:6, Revelation 5:13), and He accepts it (cf. John 20:28) without rebuke—something no faithful creature would ever do. If Christ is not consubstantial with the Father, then worship of the Son is either blasphemy or a violation of monotheism. The Scriptures teach unity, not separation of will:
- “I and the Father are one” (John 10:30)
- “All that the Father has is mine” (John 16:15)
- “The Son can do nothing of his own accord, but only what he sees the Father doing” (John 5:19)—not because the Son is less, but because He is one in will and nature with the Father.
The will of the Son is numerically the same divine will as the Father, not a separate will that voluntarily aligns with the Father's. If that were the case, it would imply the Son had a nature separate from the Father’s—thus falling into tritheism or Arianism.
The relational roles in the economic Trinity (how God acts in salvation history) reflect the immanent Trinity (God in Himself). The Son is sent, the Father sends. This does not mean inequality—being sent does not entail inferiority (cf. Gal 4:4). Rather, the Son’s mission reflects His eternal generation: He is from the Father, not inferior to Him. Aquinas again:
“Mission implies origin, not inequality.” (ST I, q.43, a.3)
To reduce the Son’s subordination to merely a matter of "will" or "functional hierarchy" (as some semi-Arian or modern subordinationist theologies do) undermines:
- The reality of the Incarnation,
- The power of Christ's redemptive act, and
- The unity of God Himself.
The Church's insistence on the Son’s co-equality, co-eternity, and consubstantiality with the Father is not speculative philosophy, but a direct guardrail against heresy that protects the truth of our salvation. As St. Athanasius proclaimed:
“If the Son is not truly God, then we are not truly saved.”
And that is why denying the full divinity of the Son—even under the guise of "order" or "will"—is not a harmless speculation, but a fatal error.
@slimboyfat
The JW position hinges on the idea that the Son began to exist. But Tertullian consistently denies this. In Against Hermogenes 5, he explicitly states that God was never alone because He always had His own Reason within Himself, and that this Reason was internal until it was expressed as the Word:
“Even then [before creation] God was not alone, for He had with Him that which He possessed in Himself—His own Reason… which He made second to Himself by agitating it within Himself.” (Adv. Hermog. 5)
That is, the Word/Son was not a separate creation, but the eternal, interior Logos of God who is later expressed outwardly in the economy of salvation. Tertullian uses temporal language (e.g., "God became Father") not to describe a literal beginning of the Son’s existence, but to emphasize that the names “Father” and “Son” become relevant when God’s eternal Word is expressed—just as “Lord” becomes a relevant title once creation exists. This is perfectly in line with Trinitarian theology, which affirms that the eternal generation of the Son is not temporal, even if economic revelation (in time) reveals it gradually.
You say: “It’s only if you impose a strict idea that Word = Son that there is a problem.” But Tertullian himself equates the Word (Logos) with the Son:
“The Word was always in the Father, just as your own reason is in yourself... That Word, therefore, is in the Father, always in the Father... He then sent the Word to be His Son.” (Adv. Prax. 5)
So no—this is not an “imposition” by later theologians. It’s Tertullian’s own theological framework. The Son is the Word made manifest, eternally present in the divine substance. Therefore, if God always had the Word, and if the Word is the Son, then the Son is eternally in God, even if the relation of paternity becomes conceptually clear only later in the economy.
You say: “Tertullian said the Son is a derivation and portion of the whole. That means the Father is greater.” But again, this misunderstands how Tertullian (and the entire tradition) uses the term “derivatio”. Tertullian is not saying that the Son is a separate essence or a lesser deity, as Arius would claim. Instead, Tertullian explains that the Son is derived from the Father’s own substance—that is, the Son is consubstantial, not separate. He literally says:
“The Father is the whole substance, but the Son is a derivation and portion of the whole... not by division... but by distinction.” (Adv. Prax. 9)
He’s not dividing God’s essence into parts, but articulating real distinction of Persons within the one divine substance. The Son receives the same divine essence by eternal generation. The Father is the principle without principle, and the Son is from the Father, but not after Him in time or less in nature. Portio is used imperfectly to describe a mode of distinction, not ontological inferiority. Later theology clarified this as homoousios (of the same essence) and rejected all misunderstandings of “subordinationism” precisely to affirm what Tertullian intended: distinction without division.
Tertullian quotes John 14:28 (“The Father is greater than I”) to show the distinction of Persons. But as St. Augustine, St. Thomas, and the Church Fathers all taught, this refers to the Son’s mission and humility—not to His divine essence. Tertullian’s functional subordination is economic: the Son is sent, the Father sends. This fits exactly with orthodox Trinitarian theology, which distinguishes:
- Immanent Trinity: The Father eternally begets the Son—equal in being.
- Economic Trinity: The Son is sent into the world and submits in the plan of salvation.
Even in Adv. Prax. 2, Tertullian is adamant that this distinction does not divide the Godhead:
“All are of one: by unity of substance. While the mystery of the economy is still guarded, which distributes the unity into a Trinity, placing in their order the three Persons—the Father, the Son, and the Holy Spirit.”
You say: “Tertullian believed Jesus is divine in some sense, just like JWs do.” No, he didn’t. Tertullian repeatedly says that the Son is God Himself:
“The Word was with God and was God... The Son is also God.” (Adv. Prax. 13)
He explicitly denies that Jesus is:
- A created being (like the angels),
- A mere creature (De Carne Christi 14),
- Or lesser in nature.
He affirms that:
- The Son is “true God from true God” (Adv. Prax. 13)
- The Son is eternal, as the inner Reason of God (Adv. Hermog. 5)
- The Trinity is one substance, three Persons (Adv. Prax. 2, 5, 9, 13)
This is exactly what the Nicene Creed affirms:
“God from God, Light from Light, true God from true God, begotten not made, consubstantial with the Father.”
That’s not Jehovah’s Witness theology.
You are trying to force Tertullian into a Jehovah’s Witness mold—suggesting he believed the Son was a lesser god who came into being. But his theology—though expressed in pre-Nicene terms—clearly teaches:
- The eternal existence of the Son as God’s Word and Wisdom.
- The Son is from the Father’s own divine substance.
- There is one divine essence, fully possessed by three distinct Persons.
- The Son is divine in nature, not merely in title.
- He is not a created being like the angels (see De Carne Christi 14).
Tertullian anticipated Nicene orthodoxy, not Arianism or JW Christology. If anything, his terminology paved the way for the clearer articulations of Athanasius and the Cappadocians. The Catholic tradition receives him as an early defender of the Trinity, and rightly so.