There is no Bible in Wicca per se, but there is a well-defined standard of ethics and code of conduct transcending most traditions. "The Charge of the Goddess," a poem often attributed to the Hereditary Witches of Tuscany (the "Strega") and modified by English poet Doreen Valiente, comes closest to "commandments" for Wiccans for living and worship. It is said to be the only "revelation" given to mankind from the Goddess on the nature of the universe and the relationship of mankind to the Divine associated with Wicca.
"The Wiccan Rede" is the ultimate Golden Rule Wiccans live by, and "The Law of Threes" speaks to atonement and responsibility for actions and conduct during incarnate lifetimes. Wiccans perceive the Divine reality on many levels each deemed valuable and appropriate based on the situation at hand. The Wiccan God is a complex collage of monotheistic, bi-theistic, polytheistic and pantheistic God force.
Wiccans perceive the transcendental God as the ONE GOD above gender and existing before all things. More immanently, but still at the higher level, they perceive the transcendental God as a balance of polar energies--simultaneously Male, the active or "projective" phenomena and Female, the passive or "receptive" phenomena. Wiccans experience the divine reality more immanently, at the bi-theistic level, by witnessing the polar forces in action through the changes of the seasons, the life cycles of animate beings and phases of the Moon.
In keeping with the active/passive concept, anything that is born, grows, ages, dies and is reborn is an active process and attributed to be Male. Seasonal change and the cycles of living things are said to be Male cycles and tied to the solar cycle of the sun. The Earth (and the Greater Cosmos), however--the stage upon which this cycle is played out, never dies. Sometimes resting passively, sometimes waxing and waning through volcanism and erosion, (and the birth and death of stars) it is the creative and containment aspect of the Goddess, or the feminine.
The God must die to move into "Summerland" (afterlife) where he rules and rests and is thus able to be reborn, through the Goddess, anew in the secular world. All humans, male or female are subject to this male cycle of life--circular annually, but a spiral spiritually. With each reincarnation the spirit grows until achieving karmic balance and then moves to another plane. This progression of souls is thought to be a spiral process that drives change in the universe.
The cycles of the Moon represent the passive and creative forces of things and are said to be Feminine. We see in the phases of the moon that the Goddess is always present—she never dies. She merely changes shape to show her various aspects…nor does she die to move between "Summerland" and the secular world in her juxtapostion with The God--she merely changes shape. Hers are those circular, cyclic or rhythmic pulsing movements, tides of ebb and flow—"containment" in the form of the womb and the chaos of the universe. She contains all matter, all things manifest and so is the tapestry on which the whole of the universe is woven.
Wiccans often take the immanent nature of divinity one step further, to the polytheistic level, by calling on a particular God or Goddess from a pantheon in mythology to aid in a mundane task or spiritual quest seeking to benefit from the particular aspect of Divinity that specific God(dess) represents. For instance, a vintner might visualize Bacchus in his prayer to help his vineyard produce a good wine harvest. He is not really asking a Roman demigod for help, rather he is focusing his prayers on that aspect of the Divine that makes the plants grow.
At the pantheistic level, we note everyone has within his/her psyche certain mythologies, experiences and Images that hold meaning for them and help visualize various aspects of the Divine. In Wicca, all Gods have potential value and all spiritual paths are sacred.
Wiccans recognize there is a "Divine spark" in all things manifest and unmanifest--from stones to trees to fields of magnetism and energy waves, and as such all are part of the Divine. Other faiths sometimes mistake this proclivity to break the Divine into experiential concepts, or to use icons or images in ritual as "idolatry." This is a misperception, as Wiccans no more "worship" nature itself or the mask of the Greenman as a God, than Christians "worship" their saints or the Virgin Mary. These visions merely iconize various aspects of the Divine so as to place the transcendental God above all Gods within reach of the human mind.
Note: We have discussed the bi-theistic aspect of Godhead in Wicca as polarities that are male and female, complementary forces at once in opposition and balance…but NOT as good and evil as in the concept of Christ and Satan. This brings us to the final overarching concept of Divinity in Wicca… THERE IS NO SATAN… no single deity of evil, nor is there original sin or vicarious atonement. There is no sacrifice required by our Gods save that we willingly make of our time and resources to help others and/or for our spiritual growth.
In Wicca, evil results from forces out of balance, or needs and hungers not met, and a breakdown of self-discipline. Evil is the failing of man unleashed into the collective unconscious, or the evil fed into the field of morphic resonance by those who see divinity as a conflict between the "all good" and "all evil" forces… that concept brought to the followers of the God of Abraham by Zoroaster from Persia in the 6th century B.C.
This concept was adopted wholesale by "Peoples of The Book" after orthodox Christians routed the Gnostics and Mohammed became the prophet of Islam.
Finally, Wiccans see the entire universe as a beneficent living being with all things connected--all crucial and sacred. Our Gods implore us to celebrate love, laughter, art, sexuality, dance, music, food, song, birth and death as necessary and beautiful parts of the Eternal Great Dance.