Everyone is situated in his occupational duty, but the purpose of material occupations should not be material gain. Rather, everyone should offer the results of his occupational activities. A brahmana especially should execute his occupational duties not for material gain but to please the Supreme Personality of Godhead. The ksatriya, vaisya and sudra should work in a similar way. In this material world everyone is engaged in various professional and occupational duties, but the purpose of such activities should be to please the Supreme Personality of Godhead. 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-Krsna or Laksmi-Narayana (there are many other forms of the Lord). In this way a brahmana, ksatriya, vaisya or sudra can worship the Deity with the results of his honest labor. Regardless of ones occupational duty, one should adopt the devotional means of hearing, chanting, remembering, worshiping, offering everything to the Lord and engaging in His service. In this way one can very easily engage himself in the service of the Lord. When the Lord is pleased with ones service, ones mission in life is fulfilled.