The Zohar explains that both Noah and Adam sinned under the influence of wine. Kabbalah teaches that wine is a powerful tool for drawing in Light, as the grape is a potent conduit of spiritual energy. Wine is therefore used as a tool in blessings to reveal God's Light into our physical world. When, through the absence of a blessing, we do not prepare a large enough Vessel, or if we consume wine for reasons not related to spirituality, the torrent of Light aroused becomes uncontrollable. This is the mystery that explains wine's ability to induce intoxicated behavior.