In verse (9) Pure devotees, whose characteristics are mentioned here, engage themselves fully in the transcendental loving service of the Lord. Their minds cannot be diverted from the lotus feet of Krishna. Their talks are solely on transcendental subjects. The symptoms of the pure devotees are described in this verse specifically. Devotees of the Supreme Lord are twenty-four hours daily engaged in glorifying the pastimes of the Supreme Lord. Their hearts and souls are constantly submerged in Krishna, and they take pleasure in discussing Him with other devotees. 

In verse (10) Krishna briefly sheds more clarity on the connection between the yoga of action and the yoga of understanding.
When a person knows the goal of life but is addicted to the fruits of activities, he is acting in karma-yoga. When he knows that the goal is Krishna, but he takes pleasure in mental speculations to understand Krsna, he is acting in jnana-yoga. And when he knows the goal and seeks Krishna completely in Krishna consciousness and devotional service, he is acting in bhakti-yoga, or buddhi-yoga, which is the complete yoga. This complete yoga is the highest perfectional stage of life. 

If a devotee is sincere and devoted to the activities of devotional service, the Lord gives him a chance to make progress and ultimately attain Him. 

In (11)verse Shri Krishna further elaborates the concept of grace. Previously, he had explained that he bestows it upon those who lovingly absorb their minds in him and make him the paramount object of their plans, thoughts, and activities. Now, he reveals what happens when someone receives his grace. He says that he destroys the darkness in their heart with the lamp of wisdom.
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