The happiness of bhakti is irreversible. Bhakti is the Sanskrit word for devotion and one of the traditional forms of yoga. There are nine forms of bhakti yoga. One of the biggest form is sravan; the reading of spiritual scriptures.
Bhakti directs our senses to contentment and happiness
Surrender and keep reading the book with ease. To surrender you need trust. Trust comes when you are very old. That is why you need to keep a discipline of bhakti. Keep your discipline and be happy with whatever you get.