I think joy and sweetness and affection are a spiritual path. We're here to know God, to love and serve God, and to be blown away by the beauty and miracle of nature. You just have to get rid of so much baggage to be light enough to dance, to sing, to play. You don't have time to carry grudges; you don't have time to cling to the need to be right.
This tenderness for life, bodhichitta, awakens when we no longer shield ourselves from the vulnerability of our condition, from the basic fragility of existence. It awakens through kinship with the suffering of others. We train in the bodhichitta practices in order to become so open that we can take the pain of the world in, let it touch our hearts, and turn it into compassion.