Animal symbolism of the cow is married to the concept of Mother Earth, and has been a symbol of fertility, nurturing, and power for centuries. This makes udder sense (pardon the pun), cows have been generous with their life force for eons. They are closely associated with provision and very earth-associated in symbolism. The cow is also a lunar symbol, aligning itself with feminine (yin) qualities among the Chinese yin-yang energies.