Two powers of human development force the man to seek for the aim – the suffering of the moment and the enjoyment expected in future.These two forces are like two locomotives pulling a heavily loaded train: the first ahead of the train, and the second one – from behind it. Upon the Creator’s will, the mankind will finally come to the condition of the absolute improvement, it means will develop from egoism to altruism. And Kabbalah helps each of us to find our own way to this condition.

Courtesy of http://www.youtube.com/watch?v=j3FQPCrAn44