The Greek word for joy is chairo which was described by the ancient Greeks as a ‘good mood of the soul’. They recognised that joy comes from internal factors, not from external ones. Contrary to what we are led to believe by advertisers, having something more, different, or new won’t get us to that place of deep joy.
The tradition of yoga says we are, at our core, satchitananda (truth, consciousness, and joy). To experience it all we need to do is clear what is in the way. From Patanjali’s yoga sutra 2.3 he describes the kleshas, the obstructions to our sensing the qualities of our true nature. One of these is Raga which is a feeling of lack and scarcity.
The way to joy is seen as discovering, literally uncovering it within yourself.
There is always already an underlying fullness. There is no lack. You are already what you are seeking.

Joy, Thich Nhat Hanh