Its amusing to hear William Safire talk about a line he wrote for Nixon, We shall not stand pat, that got a glare from the first lady. (We never used that phrase again, he says.) Safire also calls Obamas condemnation of the Bush/Cheney ideology a passage many found to be the speechs bedrock section, highlighted by the staunch declaration, We reject as false the choice between our safety and our ideals facile. Perhaps hes still smarting over Frost/Nixon.
For serious history (or rhetorician) buffs, Parade has a nifty dozen-question quiz where you can attempt to guess the presidential speaker from a single quote. Its a fun, and fairly hard, test of ones knowledge of grammar as much as inaugurations, deriving historical context from archaic syntax and antediluvian verbs such as beseems. (Spoiler alert: T. Roosevelt, 1905.)