No other work is as valuable or as exacting for either man or woman; it must always, in every healthy society, be for both man and woman the prime work, the most important work
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“Yet normally for the man and the woman whose welfare is more important than the welfare of any other human beings, the woman must remain the housemother, the homekeeper, and the man must remain the breadwinner, the provider for the wife who bears his children and for the children she brings into the world. No other work is as valuable or as exacting for either man or woman; it must always, in every healthy society, be for both man and woman the prime work, the most important work; normally all other work is of secondary importance, and must come as an addition to, not a substitute for, this primary work. The partnership should be one of equal rights, one of love, of self-respect, and unselfishness, above all a partnership for the performance of the most vitally important of all duties.” source