The trinity is equal in it's application as all are needed for salvation thru the author, the means, and the promise.
Not one can be missed in it's application either, so for the Godhead to save us there has to be a mutual transaction where not only is the trinty involved but we must be also. There is where submission is. The mystery of the Godhead revealed is the bridge.
I had just posted this on another forum but I think it applies here also.
Reckoning is summed up in the 6th chapter of (Romans 6).But that chapter also explains the spiritual sense of the words.
17 But thanks be to God that, though you used to be slaves to sin, you have come to obey from your heart the pattern of teaching that has now claimed your allegiance. 18 You have been set free from sin and have become slaves to righteousness.
19 I am using an example from everyday life because of your human limitations. Just as you used to offer yourselves as slaves to impurity and to ever-increasing wickedness, so now offer yourselves as slaves to righteousness leading to holiness. 20 When you were slaves to sin, you were free from the control of righteousness. 21 What benefit did you reap at that time from the things you are now ashamed of? Those things result in death! 22 But now that you have been set free from sin and have become slaves of God, the benefit you reap leads to holiness, and the result is eternal life. 23 For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.
Reckoning isn't a technique ... it's a spontaneous believing or considering that is produced by seeing the facts that are revealed in Romans 6.. Seeing, believing the facts in recognition of those facts, and, according to those facts, we reckon ourselves dead to sin and living to God.
That is how the spiritual aspect is recognized as truth. When we reckon ourselves as edifying ourselves from the reality of the Truth then we have placed ourselves in the correct position to recieve Him.
Not Reckoning nor eating the bread can cause the death of the old nature. Only life from the Holy Spirit explained in chapter 8 of Romans can do that. But that is the other side of the coin of reckoning, because we're to allow His work in us.
Objective facts need claiming/reckoning so that the subjective work of the Holy Spirit can accomplishe the facts in our lives. That is fellowship with God in experience.
Romans 6 plus Romans 8 (hearing plus seeing) is the spiritual aspect of feeding on the Lord for life in the Father.
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From that the work of the Trinity is seen as equally important.