The secret of joy is hidden in the word itself: first J, then O, then Y: Jesus first, Others next, Yourself last.
Gratitude is the seedbed of joy.
There is one and only one possible road to joy: selfless love.
Joy is not a feeling in us. Joy does not enter into us. We enter into joy: "Enter into the joy of your Lord" (Mt 25:21).
Those who meet Jesus always experience either joy or its opposites, either foretastes of Heaven or foretastes of Hell. Not everyone who meets Jesus is pleased, and not everyone is happy, but everyone is shocked.
God alone has the secret of eternal life and joy.