Going With the Flow

"Go with the flow." common expression

What does it mean to 'go with the flow'?  I don't think it means we never have to take action or make decisions, but I do think it means not resisting the situation we are in.  That does not mean we do not take action when it is necessary, but we do not struggle against something.  For the first time in my life at age 72 I am taking action politically --- because I think it is imperative in this situation.  That does not mean I am struggling against something --- what I am doing is taking action to help implement what I think is best for my country and the world.