A yogin perceives god (Siva) in just himself; pictures are for those who have not attained this understanding. Other worship activities during the temple may perhaps involve recitations or readings from sacred textbooks, some involving a reader and listeners and Other folks involving team recitation of sacred texts and mantras. https://hanumanmandirinsouthaustralia.blogspot.com/2025/06/silent-strength-and-living-devotion.html