Right at the start of Chapter 6, Krishna overturns a common assumption. People often picture a sannyasi as someone who has left home, given up rituals, and retreated from the world. Krishna says no. The real sannyasi is the one who keeps doing the work that needs doing — but without clinging to what that work might bring back.
Think of a farmer who tends the field every single day. He ploughs, he sows, he waters. Whether the monsoon comes on time or not is beyond him. But he does his part fully, without sitting around calculating the harvest. That spirit — full effort, zero fixation on reward — is what Krishna calls both sannyasa and yoga.
This is reassuring for anyone who thought yoga was only for monks in remote caves. Krishna is saying: stay where you are, do your work, just loosen your grip on the outcome. That shift inside is the entire practice.