ebb and flow

Ebb and flow is the foundation of the earth. The tides ebb and flow. Emotions ebb and flow. People ebb and flow. Is there anything that is so certain and so set that it does not ebb, then flow?

Give and take is the foundation of life. Sometimes you give before you take. Other times you take before you give. But the exchange of giving and taking occurs every minute of everyday. I can only hope I give as much as I take and ebb as much as I flow, before my life ebbs and flows for the last time.