Arcanā means to worship the Deity in the temple. By executing this process one confirms himself as not body but spirit soul. In the Tenth Canto, 81st Chapter, 16th verse, of the Śrīmad-Bhāgavatam, it is told how Sudāmā, an intimate friend of Kṛṣṇa, while going to the house of a brāhmaṇa murmured to himself, "Simply by worshiping Kṛṣṇa one can easily achieve all the results of heavenly opulence, liberation, supremacy over the planetary systems of the universe, all the opulences of this material world, and the mystic power of performing the yoga system."
The events leading to Sudāmā's murmuring this statement are as follows: Śrī Kṛṣṇa had ordered His friend Sudāmā to go to a brāhmaṇa's house and ask for some food. The brāhmaṇas were performing a great sacrifice, and Śrī Kṛṣṇa told Sudāmā to plead with them that He and Balarāma were feeling hungry and needed some food. When Sudāmā went there, the brāhmaṇas refused to offer anything, but the wives of the brāhmaṇas, upon hearing that Śrī Kṛṣṇa wanted some foodstuff, immediately took many palatable dishes and went to offer them to Śrī Kṛṣṇa. In the Viṣṇu-rahasya also, it is stated: "Any person within this world who is engaged in the worship of Viṣṇu can very easily achieve the ever-blissful kingdom of God, known as Vaikuṇṭha."
Rendering Service to the Lord
It is stated in the Viṣṇu-rahasya: "Any person who can arrange for service to the Lord in the same way that a king is given service by his attendants is surely elevated to the abode of Kṛṣṇa after death." Actually, in India, the temples are just like royal palaces. They are not ordinary buildings because the worship of Kṛṣṇa should be performed in just the way that a king is worshiped in his palace. So in Vṛndāvana there are many hundreds of temples wherein the Deity is worshiped exactly like a king. In the Nāradīya Purāṇa it is stated: "If a person stays in the Lord's temple even for a few moments, he can surely achieve the transcendental kingdom of God."
The conclusion is that those who are rich men in society should construct beautiful temples and arrange for the worship of Viṣṇu, so that people may be attracted to visit such temples and thereby be offered the opportunity of dancing before the Lord, or chanting the holy name of the Lord, or else of hearing the holy name of the Lord. In this way, everyone will be given the chance to elevate himself to the kingdom of God. In other words, even a common man, simply by visiting such a temple, will be able to attain the highest benedictions, not to mention the devotees who are constantly engaged in the service of the Lord in full Kṛṣṇa consciousness.