Ayin is the sixteenth letter of the Hebrew alphabet.

The gematria of Ayin is 70.

Seventy represents one who is in total control of his emo­tional attributes. As we discussed in the chapter on kaf, there are seven general emotional characteristics. Each one of these seven traits in turn contains ten levels: the three of the intellect and the seven of the emotions. When an individual has totally refined all of these seventy levels, he is then fit to lead and teach others.

The Rebbe once said, “First you must become a master over yourself, the personal world within. Then you must master your family environment. Only then can you endeavor to be a leader in the world.”