“And Rachel said, With great wrestlings have I wrestled with my sister, and I have prevailed: and she called his name Naphtali.”
Then Rachel said: I have had a great struggle with my sister, and I have won. So she named him Naphtali. Naphtali means my struggle or wrestling. The explicit acknowledgment that the children are the scorecard of a competition between sisters is Rachel's naming the family dynamic for what it is. The great struggle will continue; the winning Rachel claims is temporary. The application: the family that is organized around competition rather than covenant is the family that produces children to win, not children to love.