When the children of Israel encamped at Mount Sinai, the Sages teach that they encamped "as one man with one heart." It is from this teaching we understand that the revelation of God to the people at Mount Sinai was dependent on their being united What does this unity imply? How do we achieve unity while still respecting our individuality? Rather than look at this idea in a philosophical way, Rabbi Ashlag taught unity in the most practical way possible, by encouraging mutual love, support and responsibility between his students. His advice then is still good now.