Answer: It’s not just joy because joy can be frivolous and carefree.
I feel a long lasting joy that is based on facts, a solid matter, a strong group, on the current condition of the world. My joy is the joy of a person who stands on very solid ground. He knows that his joy is constructive, that it opens a new path for humanity. Surely, everything is done by the upper force, but we are involved in the process. We participate in it, and that is why I feel great joy.
From the 4th part of the Daily Kabbalah Lesson 11/21/2011, “The Arvut (Mutual Guarantee)”