Just as the yellow thing in the sky in the Tarot card represents the Sun, so also the Sun itself can be regarded as a symbol of the force which creates and sustains life. This is the reason the ancients celebrated the return of the Sun at Winter Solstice and is probably why the Church decided to date the birth of the Christ, the giver of life, around this time. So the Sun may be regarded as symbolic of God. Of course, as the mythologist Joseph Campbell observed, the term God itself is merely a metaphor for what one believes to be the ultimate-ultimate, whatever that may be.
Tat Tvam Asi