The word yechidus signifies a private meeting. But for chassidim, the concept of a yechidus with a Rebbe has a far deeper implication. The word yechidah refers to the highest rung of the soul, the innermost core which is at one with G‑d in constant and consummate unity. A yechidus with his Rebbe a one-to-one encounter between the yechidah of the chassid and the yechidah of the Rebbe charges the chassid’s yechidah with dynamism, so that it vitalizes his day-to-day conduct.