והאספסוף אשר בקרבו התאוו תאוה... ואכלתם בשר... לא יום אחד תאכלון ולא יומים...עד חדש ימים עד אשר יצא מאפכם
An individual who lacks the basic character trait of hakoras hatov, gratitude, is a deficient person. His negativity toward those from whom he benefits engenders a negativity throughout his entire character, eventually leading to a lack of appreciation for all that Hashem does for him. Perhaps referring to an ingrate as deficient is not strong enough. An ingrate is a non-person. Part of humanness is the ability to recognize, acknowledge and appreciate the benefits one receives from others. Without this vital character trait, one is not a mentch, decent human being. Having said this, we refer to the Torah’s account…
