http://revach.net/article.php?id=2308

Section: Tanach   Category: Megilas Rus
Boaz: A Simple Hello and The Light of Moshiach
“And behold, Boaz came from Beis Lechem and he said to the harvesters, ‘Hashem be with you!  And they said to him, ‘May Hashem bless you!”  What is the significance of this seemingly simple exchange that it was deemed worthy of being recorded for generations to come? The Malbim tells us that Boaz originated the custom of greeting others in the name of Hashem. The name of Hashem was not invoked in everyday mundane conversation until that time.  Boaz, in an attempt to instill a greater Yiras Hashem among that generation initiated the custom.  In fact, that very day, Boaz and his Beis Din had passed the law that it was permissible to use Hashem’s name in greeting. Bnei Yisroel was in need of a greater awareness of the constant presence of Hashem in all day-to-day events.

Boaz was obviously aware of Hashem’s presence in his life, and even took measures to reinforce it to others.  Yet, even Boaz could not have predicted what significance the ordinary events of that day would have for Klal Yisroel. ‘Rav Yitzchak said, “For if Boaz had known that the posuk would write about him, “He handed her parched grain, and she ate and she was satisfied and left over,” he would have fed her fattened calves.”  This simple act of kindness was the beginning of the relationship that would lead to the formation of the dynasty of Moshiach.