Let the churches preach doctrines, theories, philosophies to their hearts' content, but when it comes to worship, the real practical part of religion, it should be as Jesus says, "When thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret".
Swami Vivekananda (2016). “Addresses on Bhakti Yoga: Art of living”, p.39, editionNEXT.com