The process of devotional service is a very happy one (su-sukham). Why? Devotional service consists of sravanam kirtanam visnoh,  so one can simply hear the chanting of the glories of the Lord or can attend philosophical lectures on transcendental knowledge given by authorized acaryas. Simply by sitting, one can learn; then one can eat the remnants of the food offered to God, nice palatable dishes. In every state devotional service is joyful.

From Srila Prabhupada’s purport to Bg 9.2