So among all these, Dhyan Yagya is best – meditation and group meditation.
Then Gyan Yagya – sitting and listening to knowledge.
Then Japa Yagya – ‘Yagyanaam Japayagyosmi’, Krishna also said Japa Yagya (chanting the name of the Divine) is very good.
And what does Yagya do? It purifies one’s mind, body and environment.