The Root of the Human Soul

As Lewis tries to help us understand over and over again, there is abiding theological truth in the pre-Copernican understanding of the universe. Among other aspects of that view, our sphere of life, here on Earth, was understood as the topmost twigs and branches of the Tree of Reality, which had its roots in the uppermost heaven, the dwelling of God Himself. So true! To use the image, God is indeed the root of all being, even its substance. Especially is he the Root of our souls, as they are made in His very image.
What, may we ask - if we want to extend the imagery here - is the nourishment, as it were, conveyed to us from God via our roots which are found in Him? St. Paul tells us: love.
Ephesians 3:14-19:
For this cause I bow my knees unto the Father of our Lord Jesus Christ, Of whom the whole family in heaven and earth is named, That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man; That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, May be able to comprehend with all saints what is the breadth, and length, and depth, and height; And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God.
The love of God is the root of the human soul. Whatever else we may think is important to improve our lives, or the lives of those we love, this is the first and primary element. Our souls need to drink from the life-giving sap of the love of God. Here is the balm for our hearts and the rock upon which to build our sanity and our relationships.
"Come unto Me, all ye who are weary and heavy laden, and I will give you rest."