After 40 long years, Moshe gathers the nation for a series of farewell addresses. While the bulk of his words are a recap of history, and exhortations for the future, we also find dozens of new laws never recorded previously. Among them is Birkat Hamazon - the requirement to thank God after eating.
Why now? Wasn't there a need to show appreciation for the past forty years?
For four decades, Manna fell from Heaven. Now, the nation was poised to make their own bread. It's easy to feel a sense of appreciation when overt miracles are showered down from above. Its something else to recognize God after we invest our own blood, sweat, and tears. Reality was about to change and what seemed obvious up until now needed to be emphasized for the future.
No matter how much grit and tenacity we exert to achieve our goals, success must ultimately be recognized as a blessing. May we celebrate prosperity with a sense of humility and gratitude.