No one becomes a Karma-yogi who has not renounced the selfish motive behind an action.
Do your duty, to the best of your abilities, for the Lord without any selfish motive, and remember God at all times - before starting a work, at the completion of a task, and while inactive.
The live in wisdom who see themselves in all and all in them, who have renounced every selfish desire and sense craving tormenting the heart.
A person whose all works are free from selfish desires and motives, and whose all Karma is burned up in the fire of Self-knowledge, is called a sage by the wise.
A Karma-yogi, abandoning the fruit of work, attains Supreme Bliss while others, who are attached to the fruits of work, become bound by selfish work.
A person is said to have attained yogic perfection when there is no desire for sensual pleasures, or attachment to the fruits of work, and has renounced all personal selfish motives.
Attached action is selfish work that produces Karmic bondage.