Gittin Daf 35

Rav Zeira says that they stopped only widows from swearing to collect the Kesuba, divorcees still swear. The reason for this is because a widow toils to care for the orphans and she might "asya l'oroyei hetera" rationalize swearing that she did not receive any money from the Kesuba, even if she did, since she feels that she is entitled to compensation for her toil. We can learn an important lesson from this about the danger of rationalization. We often rationalize all the wrong things we do because we feel a sense of entitlement, we deserve a break. We have to be careful when we find ourselves looking for the loopholes....