Of all the yogis, he who with his heart dissolved into Me (the Supreme), worships Me with sufficient devoutness, I consider him to be the most united with Me.
Here Krishna makes a significant transition. First he exposed S¡ṅkhya-yoga. As a preliminary and alternate pursuit, he also discussed Karma-yoga. As a corollary of both, he prescribes renunciation. To imbibe it he enjoins meditation, the backbone of spirituality.
But here now he transits from all these to the broad pedestal of devotion, where he wants the seeker to rely solely upon the Supreme, which embodies everything in one’s life and attainment. To induce and strengthen the seeker accordingly, he intends to describe Creation, its source, sustenance and dissolution, namely God, as the Self in everyone. The Guru, Teacher, alone knows the Truth and can explain it with mastery and authority.
He concludes the first section of Gita (chapters one to six), alluding to the theme in the next six chapters where the individual Krishna rises to the dimension of the huge Creation, to demonstrate the whole intricacy. Thereby he initiates the disciple to reach with facility and firmness where he should.