Judaism has no central religious authority that could formulate or issue a unified creed. The various "principles of faith" that have been enumerated over the intervening centuries carry no greater weight than that imparted to them by the fame and scholarship of their respective authors. Central authority in Judaism is not vested in any person or group but rather in Judaism's sacred writings, laws, and traditions. In nearly all its variations, Judaism affirms the existence and oneness of God. Judaism stresses performance of deeds or commandments rather than adherence to a belief system.