Jnat,
God is a term that many people still apply excusively to YHWH or something very similar. I tend to think of what the Mythology about god and gods that come from collective psyche of humans is really pionting to and I think it is what Jung called the "Self" it is the center of and also entire psyche Atman/Brahman type of thing.
So maybe you have a desire to give artistic expression that comes from your center the "Self" that could be a driving force, hard to say.
http://en.wikipedia.org/wiki/Self-realization
Psycho-analysis
Though Sigmund Freud was skeptical of religion and esotericism, his theories have had a lasting influence on western thought and self-understanding. His notion of repressed memories, though based on false assumptions, has become part of western mainstream thinking. [10]
Freud's ideas were further developed by his students and neo-psycho-analyststs. Especially Carl Jung, Erik Erikson and Winnicott have been important in the western understanding of the self. But also other alternatives have been developed.
Jung developed the notion of individuation, the lifelong process in which the center of psychological life shifts from the ego to the self.
Erikson described human development throughout the life-span in his theory of psychosocial development.
Winnicott developed the notion of the true self.
Roberto Assagioli developed his approach of Psychosynthesis, an original approach to psychology.
[edit] Humanistic psychology
Abraham Maslow and Carl Rogers, leaders in the Humanistic Psychology movement, developed the concept of self-actualization.
Based on Maslow, the most common meaning given to self-realization is that of psychological growth. It represents the awakening and manifestation of latent potentialities of the human being -for example, ethical, esthetic, and religious experiences and activities. [11]