His is a morally sound announcement for the common good and in accord with the founding documents.
Because the writers of those documents recognized that "Blessings of Liberty" is not a legal phrase; they knew also, the concept of justice appears in Mosaic Law founded in 1312 BC, which makes the concept at least 3,300 years old...
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America"....
https://en.wikipedia.org/wiki/Constitution_of_the_United_States
Those writers also knew that a Creator was revealed in 2000 BC, over 3,700 years ago
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed.
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https://en.wikipedia.org/wiki/United_States_Declaration_of_Independence