SB 1. 2 . 6-10
The supreme occupation [dharma] for all humanity is that by which we can attain to loving devotional service unto the transcendent Lord. Such devotional service must be unmotivated and uninterrupted to completely satisfy the self.
By rendering devotional service unto the Personality of Godhead, Sri Krishna, one immediately acquires causeless knowledge and detachment from the world.
The occupational activities a person performs according to his own position are only so much useless labor if they do not provoke attraction to hearing the message of Godhead.
All occupational engagements are certainly meant for ultimate liberation. They should never be performed for material gain. Furthermore, according to the sages, one who is engaged in the ultimate occupational service should never use material gain to cultivate sense gratification.
Life's desires should never be directed toward sense gratification. One should desire a healthy life, or self-preservation, since a human life is meant for inquiry about the Absolute Truth. Nothing else should be the goal of one's works.