Joy isn't the absence of sadness—it's the presence of the Holy Spirit. And although the Holy Spirit produces joy within us, He often does so by humbling us so that we would take our eyes off ourselves and fix our eyes on Christ. Real joy exists even amid real sadness, and real joy doesn't always mean there's a smile on our faces. It sometimes means we are on our knees with tears of repentance. Charles Spurgeon admitted, "I do not know when I am more perfectly happy than when I am weeping for sin at the foot of the cross."