Spiritual exercises such as puja (worship), bhajans (loving adoration), dhyana (meditation ) are activities
prompted by devotion to take you to a higher plane. Controversy
about their efficacy should not be indulged in by those who are
unaware of the depths and heights to which they can lead. These
can be gained and judged only through actual practice. The proof
lies in one's personal experience alone.
-Divine Discourse,
Leela Kaivalya Vahini.