The joy we have on the three major festivals (Pesach, Shavuos, and Sukkos) can give us a share in the Inner Light of God. This brings new life to the soul and the mind, through which we gain our perception of God. —Rebbe Nachman of Breslov
We are required to be joyful. In fact, as Rebbe Nachman teaches, Mitzvah gedolah, l’hiyos b’simcha tamid* — It is a big mitzvah to be happy, always.
The three festivals and Shabbos are the times when is easiest to experience joyful, spiritual energy. But how much joy can a person have? Isn’t there a limit?
No. The type of true joy that you experience on the holidays is limitless, says the Rebbe. This joy’s actually made up of all the joy of the mitzvos you’ve done all year long.
*This saying has been turned into a popular song.