Purport

Starting from Shloka#20 of this chapter, Bhagvan Shri Krishna described all different aspects of devotion and worship. Describing in Many people who may worship different deities for whatever desires, gets the appropriate results when their worship is successful. Although all worship finally reaches to Bhagvan Shri Krishna(9.24)but a worshipper of deities attains the Lokas of devas(deities)(9.25). Those who worship Shri Krishna reach the abode of Shri Krishna. (9.25-26).
Later Shlokas, Bhagvan Shri Krishna described how his doors are always open for anybody, even for those who are born in the family of a sinner like a murderer, robbers or those who have sinful past but decided to correct their way opting for pure actions.

In this Shloka Bhagvan Shri Krishna give the surest way of achieving the abode of Shri Krishna. Bhagvan instructs Arjuna to engage completely into Shri Krishna, engaging in mind, action devotion, and complete dedication. This will ensure the complete unification of a human to God, Shri Krishna and that humans will achieve the supreme abode of Shri Krishna.