The Blessed Buddha once said:
And what, Bhikkhus, is the Joy not of this world? Aloof and above sensual lust,
quite secluded from any sense desire, protected from any disadvantageous
mental state, one enters and dwells in the 1st jhana mental absorption; full of
Joy & pleasure born of solitude, joined with directed & sustained thought...
With the stilling of directed & sustained thought, one later enters & dwells
in the 2nd jhana of calmed assurance & unification of mind devoid of any thought,
yet joined with Joy & pleasure born of concentration.
These are called the joys not of this world!
And what, Bhikkhus, is the Joy beyond that joy, which is not of this world?
When a bhikkhu, whose mental fermentations are eliminated, reviews his mind
liberated from lust, freed from hatred, and released from confusion, there arises
a transcendental joy. This is called Joy beyond that joy, that is not of this world...

Source (edited extract):
The Grouped Sayings of the Buddha. Samyutta Nikaya. Book IV [235-7]
section 36:11 On Feeling: Vedanā. Joys beyond this world ...
http://www.pariyatti.com/book.cgi?prod_id=948507
http://www.accesstoinsight.org/canon/samyutta/index.html