Pathways to the Heart
From the Words of HaRav Yoram Abargel zt”l
The vitality and lifeblood of life is joy.
True joy is attained by nullification and self-defacement before G-d, without this feeling, joy is not attainable or possible.
Thus, joy is essentially an expression of nullification. Thus, the attribute of Chochmah - Wisdom, which is characterized by nullification, is followed by the attribute of Binah - Understanding, which is expressed through joy.