by St. Theophan the Recluse (1815-1894) -
Church services, that is, all the daily services, together with the entire arrangement of the church’s icons, candles, censing, singing, chanting, movements of the clergy, as well as the services for various needs; then services in the home, also using ecclesiastical objects such as sanctified icons, holy oil, candles, holy water, the Cross, and incense — all of these holy things together acting upon all the senses — sight, hearing, smell, touch, and taste — are the cloths that wipe clean the senses of the deadened soul. They are strongest and only reliable way to do it.
The soul becomes deadened by the spirit of the world, and possessed by sin that lives in the world. The entire structure of our Church services, with their tone, meaning, power of faith, and especially the grace concealed with them, have an invincible power to drive away the spirit of the world. In freeing the soul from the world’s onerous influence, it allows the soul to breathe freely and to taste the sweetness of spiritual freedom.
Walking into church we walk completely into a completely different world, are influenced by it, and change according to it. The same thing happens when we surround ourselves with holy objects. Frequent impressions of the spiritual world more effectively penetrate within and more quickly bring about a transformation of the heart.
(The Path to Salvation: A Manual of of Spiritual Transformation, pg. 254)