Answer: The sun and water are two forces: developing and filling.
The water is the quality of bestowal, the Light of Hassadim, and the sun is the Light of wisdom, the Light of Hochma. Their combination affects the soul and develops it. The Light of Hassadim expands and the Light of Hochma fills. This is the way spiritual elements develop.
If one wants to develop a spiritual gene, he should study Kabbalah.
From the Kabbalah Lesson in Russian 2/18/17