If you think, if a prisoner thinks that "I am in this cell. Let me request the superintendent of the jail to change my cell and I'll be happy," that is a mistaken idea. One cannot be happy so long he is under the prison walls. One should become free. That should be the aim of our life. So we are trying to be happy by changing the cell, by this "ism" to that "ism," by capitalism to communism, from communism to this "ism," that "ism." That will not make us happy.
-Lecture on SB 2.3.17 -- Los Angeles, July 12, 1969

धर्मस्य ह्यापवर्ग्यस्य नार्थोऽर्थायोपकल्पते ।
नार्थस्य धर्मैकान्तस्य कामो लाभाय हि स्मृत: ॥ ९ ॥
All occupational engagements are certainly meant for ultimate liberation. They should never be performed for material gain. Furthermore, according to sages, one who is engaged in the ultimate occupational service should never use material gain to cultivate sense gratification.
-Shrimad Bhagvatam Canto 1 Chapter 2 Verse 9