I find there to be alot of Kabbalistic symbolism in Freemasonry. I know you will be hard pressed to find any Grand Lodge agreeing with this, and fair enough, the discussion of symbolism is a subjective one and can differ from student to student. But from my point of view, there really can be no denying that the Fellowcraft standing between the two columns in the Second Degree is very symbolic of the three pillars of the Kabbalistic Tree of Life.
In both cases, the middle pillar and the Fellowcraft are in a state of balance between the extremes of the columns on the right and left. Both philosophies espouse the virtues of leading a balanced life. The center path of the Tree of Life is a direct route to the Grand Archirect of the Universe. Following that balanced path would seem to fulfill the Masonic promise to make good men better.