Symbolism

The Fool is the spirit in search of experience. He represents the mystical cleverness bereft of reason within us, the childlike ability to tune into the inner workings of the world. The sun shining behind him represents the divine nature of the Fool's wisdom. On his back are all the possessions he might need. In his hand there is a flower, showing his appreciation of beauty. He is frequently accompanied by a dog, sometimes seen as his animal desires, sometimes as the call of the "real world", nipping at his heels and distracting him. He is seemingly unconcerned that he is about to walk off the edge of a cliff, engaged in the supremest act of idiocy or trust.

The number 0 is a perfect significator for the Fool, which can become anything when he reaches his destination. Zero plus anything equals the same thing. Zero times anything equals zero.[1]



http://en.wikipedia.org/wiki/The_Fool_(Tarot_card)