In the words of Michael Laitman, “It is beyond human comprehension to understand the essence of such spiritual qualities as total altruism and love. This is for the simple reason that human beings cannot comprehend how such feelings can exist at all, as everyone seemingly requires an incentive to perform any act; without some personal gain, people are not prepared to extend themselves. That is why a quality such as altruism can only be imparted to a person from Above, and only those who have experienced it can understand it.”
So sit back and let the wisdom of Kabbalah wash over you.
Courtesy of http://www.youtube.com/watch?v=4oZ