Peter Leithart said this quote
“ Baptism is one of those more effective rites that come in with the new covenant. The fact that baptism takes the place of the multiple, complicated cleansing rites of stoicheic order is itself a sign that salvation has come to the world. And the fact that baptism does the miraculous work of binding diverse flesh into one body means that baptism is one of the rites that effects the social salvation of humanity. ”