Here are a few:
A rich child often sits in a poor mother's lap.-Danish Proverb
A mother understands what a child does not say.-Jewish proverb
A mother is not a person to lean on but a person to make leaning unnecessary.-Dorothy Canfield Fisher
For the hand that rocks the cradle is the hand that rules the world -William Ross Wallace
No matter how old a mother is, she watches her middle-aged children for signs of improvement.-Florida Scott - Maxwell
I think it must somewhere be written, that the virtues of mothers shall be visited on their children... -Charles Dickens
When I stopped seeing my mother with the eyes of a child, I saw the woman who helped me give birth to myself. - Nancy Friday
In motherhood, there's so much to learn, so much to give, and although the learning gets less with each succeeding child, the giving never does. -Marguerite Kelley and Elia Parsons