Verses 6 and 7 as per Sankara Bhashya with commentary by Shri Alladi Mahadeva Sastri
Namaskaar. In an earlier post Swami Chinmayananda explained these 2 verses. Her is what Sankara Bhashyam says about these :
Salvation by Worship of Ishvara
Later on we shall describe the conduct in life of the worshippers of the Imperishable (Akshara Upasakas)
But those who worship Me, renouncing all actions in Me, regarding Me Supreme, meditating on Me with exclusive devotion (Yoga); for them whose thought is fixed on Me, I become ere long, O Son of Pritha, the deliverer out of the Ocean of Samsara.
Samsara is referred to as an Ocean as its very difficult to cross over it without a guide.
Pranaam from Kamal Kothari