There are three knots connecting one to another, The Holy One, blessed be He, Torah and Israel. One triangle represents this 3 sided connection on an inner dimension, and the second triangle refers to an external dimension. The essence of the soul connects with Gods essence through the study of Torah and Kabbalah. The external connection to God is through practical application of these studies.
– The Jewish Zohar, Meaning and Origins of the Star of David, The Free Library.com