For every thing by whatsoever causes it is created, by the same is it destroyed. It is not matrimony but the will that makes the union; and therefore it is not a separation of bodies but a separation of wills that dissolves it. He then who puts away his wife and does not take another is still her husband; for though their bodies be not united, their wills are united. But when he takes another, then he manifestly puts his wife away; wherefore the Lord says not, Whoso putteth away his wife, but, “Whoso marrieth another, committeth adultery.”
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).