To go with the flow is to accept what happens rather than fight it. Just go with the flow, go with the flow for now, learn to go with the flow.
It is advice about temperament, and whether it is wisdom or passivity depends entirely on what is being accepted. The image is a swimmer carried by a current rather than swimming against it.
1phrasego with the flowTo accept what happens rather than fight it.
“On holiday, I don't make plans; I just go with the flow.”
go with the flow is an accepting.
From flow in the sense of the direction of a current.
Here, flow is used in the sense of "direction of movement."
Etymology from Wiktionary, CC BY-SA
Practised in Idioms