Srimad Bhagavad-Gita :
Chapter-5. ( Karma-sanyasa-yogam )
Lord Sri Krishna has already explained during discussions with Arjuna on Karmam in third and fourth chapters in detail.
Hereafter, after following and practicing them, Sadhaka-s should achieve the Supreme Goal 'Perfection'.
Therefore, hence Lord has to explain the method to "how to discard 'Karmam' intelligently.
From 'Tamasic' and 'slumber' it is essential to awake human being and initiate /engage him in Karmam.
At least let him do karmam for his selfish needs, if he proceeds like this to gain and enjoy the fruits of his karmam, he will be changing from his 'Tamo-gunam' to 'Rajo-gunam'.
Then, thereafter, he has to has to come out of this stage, i.e, "Sakama-karmam."
For this he has to change this "Sakama-karmam" to "Nishkama-karmam."
That is, discard selfish-karmam, and then do karmam for the benefit of society / community/ to the whole world, honestly and sincerely.
This way whatever karmam done is called "Yjnam"
When he reaches this stage, in Sadhakan, "Satvic-gunam" enlarges, then his inner will be crystal clear and peaceful.
Then only he is preparing for the eligibility for "Atma-dyanam" (search of Self) / meditation.
Through this, Sadhakan is gradually overcome his bhavam of jivatma and achieve the "Paramarma-Anubhuthi" ( Bliss).
To be continued ....