“Devotional service is very simple, and anyone can adopt it. Let one remain what he is; he need only install the Deity of the Supreme Lord in his house. The Deity may be Radha-Krishna or Lakshmi-Narayana (there are many other forms of the Lord). In this way a brahmana, kshatriya, vaishya or shudra can worship the Deity with the results of his honest labor.” (Shrila Prabhupada, Shrimad Bhagavatam, 4.20.9 Purport)