Continued from here….
I am the true Vine, and My Father is the Husbandman (John 15:1).
And when He calls the Father Husbandman, why does He give Him this title?
For the Father is not idle or inert in His dealings with us, and while the Son nourishes us and sustains us in a perfect state by the Holy Spirit, the rectification of our condition is as it were the function of the whole sacred and consubstantial Trinity, and the will and power to do all the actions done by It pervades the whole Divine Nature.
Therefore It is glorified by us in its entirety, and in one single aspect. For we call God a Saviour, not gaining the graces which are compassionately bestowed upon us partly from the Father, and partly from the Son Himself or the Holy Spirit, but calling our salvation the work of One Divinity.
And if we must apportion the gifts which are bestowed upon us, or those activities which They display about creation, to each person of the Trinity separately, none the less do we believe that everything proceeds from the Father by the Son in the Spirit.
You will think then quite rightly that the Father nourishes us in piety by the Son in the Spirit. He husbands us, that is He watches over us, and cares for us, and deems us worthy of His sustaining providence by the Son in the Spirit.
[…] For it is the function of the vine to nourish the branches, and of the tiller of the soil to tend them. And if we think aright, we shall believe that neither the one function, if performed apart from the Father, nor the other apart from the Son or the Holy Ghost, could sustain the whole. For all proceeds from the Father by the Son in the Spirit, as we have said.
Very appropriately now the Saviour called the Father a Husbandman, and it is not at all difficult to assign the cause. For it was to the intent that no one might think that the Only-Begotten merely exercised care over us that He represents God the Father as co-operating with Him, calling Himself the Vine that quickens His own branches with life and productive power, and the Father a Husbandman, and for this reason teaching us that providential care over us is a sort of distinct activity of the Divine Substance.
For we were bound to know that God did not only make us partakers of His nature, conceived of as belonging to the Holy and consubstantial Trinity, but also He watches over us with, the most diligent care, which is illustrated to us very appropriately on this occasion by the figure of husbandry.
Cyril of Alexandria (c. 376-444): Commentary on John, Book 10 (on John 15:1ff).