Ebb and Flow....
Ebb and flow are two phases of the tide or any similar movement of water. The ebb is the outgoing phase when the tide drains away from the shore, and the flow is the incoming phase when the water rises again.
I have always loved the phrase 'Ebb and Flow' and in fact, it can be applied to many things in life, like relationships. "Relationships ebb and flow, like the waves of the sea. ... Like the seasons and the tide, relationships have cycles. A pattern of closeness, profound intimacy, followed by a pulling back, even disengagement, then re-engagement, and then closeness again".
It's interesting when you think about those relationships in your life and how true this saying is for some of those people.