The spiritual process may be compared to the conversion of milk into butter. The body is like a house. The heart is the vessel in which the milk of consciousness is boiled over the stove of devotion. The vessel is covered by the lid of sraddha (earnestness). When the fire of Viveka (discrimination) is lit, the cream of understanding comes up from the boiling milk. To prevent the cat of Maya from getting at the milk, the door has to be barred by the gate of Sujnana (wisdom). After the milk is cooled by Santhi (tranquillity) and the buttermilk of the Divine Name is added to it, the curd of Divine Grace is formed. When this curd is churned with the rod of knowledge and the rope of love, the whey of ignorance is separated and the butter of the Atma Reality (the Jiva) emerges. It is such a realised Self who attains oneness with the Divine.