Joy is the state of being which is achieved via the act of being good, positive communication, giving and sharing.
The word Joy roots from the Hebrew term called Simchat Torah -meaning the Joy of the Torah. That which is achieved via the shekinah presence of God. 

The word “Joy” meaning the psychological state of one’s being, being excited or stimulated due to experience of intimacy, and the physical act of exchange.

a : the emotion evoked by well-being, success, or good fortune or by the prospect of possessing what one desires : delight- hapiness, inner peace. The state of being which is stimulated by the holy presence of Shekinah and the Edenic energies.

Isaiah 51:3 For the Lord will comfort Zion, He will comfort all her waste places; He will make her wilderness like Eden, And her desert like the garden of the Lord; Joy and gladness will be found in it, Thanksgiving and the voice of melody.

Ezra 6:22 -And they kept the Feast of Unleavened Bread seven days with joy; for the Lord made them joyful… Isaiah 30:29 you shall have a song as in the night when a holy feast is kept, and gladness of heart…

The different gentile nations also had their own ways they used so that may attain Joy – Read the article called; The pagan form of Joy and happiness:
Article written by Ap Ngabo Alex