Krsna has begun in this chapter, catur-varnyam maya srstam guna-karma-vibhagasah [Bg. 4.13]. That is very essential, the varnasrama-dharma. Because we must have the aim of life. At the present moment there is no aim of life. The aim of life is sense gratification. That's all.
Lecture on Bhagavad-gita 4.16, Bombay, 5 April, 1974