How to use "perpetual" in a sentence

I hold that, in contemplation of universal law and of the Constitution, the Union of these States is perpetual

Descending from these general principles, we find the proposition that in legal contemplation the Union is perpetual confirmed by the history of the Union itself

It was further matured, and the faith of all the then thirteen States expressly plighted and engaged that it should be perpetual, by the Articles of Confederation in 1778

Here was a four-masted barkentine with sails taut in a perpetual wind; and here was a mid-sixteenth-century Swedish kravel