The New Year for Trees! Tu B'Shvat offers a unique opportunity for insight into living and personal growth. Throughout the centuries, Mystics have used the tree as a metaphor to understand God's relationship to the spiritual and physical worlds. In the 16th century, the Kabbalists of Tzfat compiled a Tu B'Shvat "seder," somewhat similar to the seder for Passover. The Seder involves the eating of different fruits that correspond to different Sephirot and the Four Mystical Worlds.