In kabbalah, this first human was Adam but not the 'Adam' of the next story. THIS Adam was 'adam kadmon' the primordial adam. This Adam was a unity, both male and female, and it/he was huge - this Adam could see from one end of the universe to the other, and this is the Adam that was 'given dominion' etc.
But the original creation 'shattered' into the separate sparks filling the universe, and God had to remake the world, and this time we have the 'Adam' and 'Eve' we see in the next part of Genesis - and the created world is filled with little lost 'sparks' of divinity hidden by 'shells' which we need to be found, polished up or revealed and reunited with God - we are fixing the world this way so that things become they way they always 'should have' been and man's unity is as apparent as God's unity.
(now I'm pulling up related ideas from other readings)
(it is fairly common in Jewish circles - I heard it at my kid's summer camp, actually) to understand the original human as a composite male/female, which was 'divided' into a male half and a female half (Adam and Eve).)
Tiferet-Splendor is the sefirah of vision, purpose and capacity for high-level organization in light of that purpose.
How are humans able to hold this vision, this sense of purpose? It is because we have 'heart', and the sefirah of Tiferet is also the 'heart' of the Kabbalistic Tree. If you look at the graphics, you will also see that the 'heart' sefirah has a direct connection to the 'Crown'
'This tells us that the heart can become a direct expression of the soul.'
The heart - in a person - can be expressed in a human as 'passion' (not sexual passion, but more like purpose and dedication to change the world).
In the Bible, we see that people put things in their hearts, or thought over things in their hearts, because the heart is the source of true, deep understanding.
Nachman of Breslov has a story about heart - excerpts only -
Everything has a heart, therefore the world has a heart. The Heart of the World is full of yearning. It years for a Spring that comes from a rock which is on top of a Mountain at the far end of the world. But the Heart cannot reach it, partly because when the Heart leaves its place at the OTHER end of the world, it is beaten down by the sun, but also because the Heart cannot live without seeing the Spring, and once the Heart gets too close it won't be able to actually see it, and would die...
If the Heart died, then the entire world would cease to exist. The Heart is the life force of all things, and nothing can exist without a heart.
The Spring is the divine Wisdom, flowing forth. Understanding (Binah) is the Mother and Wisdom (Chochmah) is the Father (I should have mentioned that before, sorry).
The aspect of the sun (which beats down on the Heart and keeps the Heart from reaching the Mountain where the Spring is) -
The aspect of the sun in Splendor is the pull of waking consciousness...with all its daily tasks, physical needs and material desires. This is the world in which we all live.
so the cares and concerns of daily life is always working to distract us from our 'true' selves and our innermost actual needs and desires.
Rabbi Nachman is telling us that the human heart is stretched between the longing for God on the one hand and the pull of responsibility for, and responsiveness to, the world on the other. Yet this tension is exactly where we must live.
History is the fiction we invent to persuade ourselves that events are knowable and that life has order and direction. That's why events are always reinterpreted when values change. We need new versions of history to allow for our current prejudices.