Poor Power Meaning

Example : 1863 Nov. 19, Abraham Lincoln, The Gettysburg Address:  We cannot hallow this ground. The brave men, living and dead, who struggled here, have consecrated it far above our poor power to add or detract.1879, George MacDonald,Sir Gibbie, ch. 52:  Gibbie held her fast, and with all the ways in his poor power sought to comfort her.1890, H. Rider Haggard, Beatrice, ch. 26:  Heavy as was her burden, not one feather's weight of it should he carry, if by any means in her poor power she could hold it from his back.1986 May 19, "Fund Finishes Half a Century of Philanthropy with a Party," New York Times (retrieved 7 March 2014):  "The spirit of the Stern Fund will continue," he said. "It is beyond the poor power of lawyers to dissolve it."